Nginx Reverse Proxy Problem

Question

I am having an issue with my nginx.conf file where my proxy_pass for nas.domain.com IS forwarded to the correct address, but cloud.domain.com is not.

Can anyone please help me figure out what is wrong with my file? My domain name has been changed to protect the innocent:

load_module /usr/local/libexec/nginx/ngx_mail_module.so;                                                                            
load_module /usr/local/libexec/nginx/ngx_stream_module.so;                                                                          

#user  nobody;                                                                                                                      
worker_processes  1;                                                                                                                

# This default error log path is compiled-in to make sure configuration parsing                                                     
# errors are logged somewhere, especially during unattended boot when stderr                                                        
# isn't normally logged anywhere. This path will be touched on every nginx                                                          
# start regardless of error log location configured here. See                                                                       
# https://trac.nginx.org/nginx/ticket/147 for more info.                                                                            
#                                                                                                                                   
#error_log  /var/log/nginx/error.log;                                                                                               
#                                                                                                                                   

#pid        logs/nginx.pid;                                                                                                         

events {                                                                                                                            
     worker_connections  1024;                                                                                                       
}                                                                                                                                   

http {                                                                                                                              
    include       mime.types;                                                                                                       
    default_type  application/octet-stream;                                                                                         

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '                                                      
    #                  '$status $body_bytes_sent "$http_referer" '                                                                  
    #                  '"$http_user_agent" "$http_x_forwarded_for"';                                                                

    #access_log  logs/access.log  main;                                                                                             

    sendfile        on;                                                                                                             
    #tcp_nopush     on;                                                                                                             

    #keepalive_timeout  0;                                                                                                          
    keepalive_timeout  65;                                                                                                          

    #gzip  on;                                                                                                                      

    server {                                                                                                                        
        listen       80;                                                                                                            
        server_name  domain.com www.domain.com;                                                                           

        #charset koi8-r;                                                                                                            

        #access_log  logs/host.access.log  main;                                                                                    

        location / {                                                                                                                
            #root   /usr/local/www/nginx;                                                                                           
            #index  index.html index.htm;                                                                                           
            proxy_pass http://192.168.1.5;                                                                                         
        }                                                                                                                           
    }                                                                                                                                   

    #                                                                                                                                   
    #error_page  404              /404.html;                                                                                   
    #                                                                                                                                   
    # redirect server error pages to the static page /50x.html                                                                  
    #                                                                                                                           
    #        error_page   500 502 503 504  /50x.html;                                                                                   
    #        location = /50x.html {                                                                                                     
    #            root   /usr/local/www/nginx-dist;                                                                                      
    #        }                                                                                                                          

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80                                                                 
    #                                                                                                                           
    #location ~ \.php$ {                                                                                                        
    #    proxy_pass   http://127.0.0.1;                                                                                         
    #}                                                                                                                          

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000                                                        
    #                                                                                                                           
    #location ~ \.php$ {                                                                                                        
    #    root           html;                                                                                                   
    #    fastcgi_pass   127.0.0.1:9000;                                                                                         
    #    fastcgi_index  index.php;                                                                                              
    #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;                                                          
    #    include        fastcgi_params;                                                                                         
    #}                                                                                                                          

    # deny access to .htaccess files, if Apache's document root                                                                 
    # concurs with nginx's one                                                                                                  
    #                                                                                                                           
    #location ~ /\.ht {                                                                                                         
    #    deny  all;                                                                                                             

    #}                                                                                                                          
    #}                                                                                                                              


    server {                                                                                                                            
        server_name nas.domain.com;                                                                                                  

        location / {                                                                                                                        
            # app1 reverse proxy follow                                                                                                       
            proxy_set_header X-Real-IP $remote_addr;                                                                                          
            proxy_set_header Host $host;                                                                                                      
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;                                                                      
            proxy_pass http://192.168.1.121:8080;                                                                                             
        }                                                                                                                                   
    }                                                                                                                                   

    server {                                                                                                                            
        listen cloud.domain.com:80;                                                                                                  
        server_name cloud.domain.com;                                                                                                
        location / {                                                                                                                
            # app2 reverse proxy settings follow                                                                                
            proxy_set_header X-Real-IP $remote_addr;                                                                            
            proxy_set_header Host $host;                                                                                        
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;                                                        
            proxy_pass http://192.168.1.2:2080;                                                                                 
        }                                                                                                                           
    }                                                                                                                                   

    # HTTPS server                                                                                                                  
    #                                                                                                                               
    #server {                                                                                                                       
    #    listen       443 ssl;                                                                                                      
    #    server_name  localhost;                                                                                                    

    #    ssl_certificate      cert.pem;                                                                                             
    #    ssl_certificate_key  cert.key;                                                                                             

    #    ssl_session_cache    shared:SSL:1m;                                                                                        
    #    ssl_session_timeout  5m;                                                                                                   

    #    ssl_ciphers  HIGH:!aNULL:!MD5;                                                                                             
    #    ssl_prefer_server_ciphers  on;                                                                                             

    #    location / {                                                                                                               
    #        root   html;                                                                                                           
    #        index  index.html index.htm;                                                                                           
    #    }                                                                                                                          
    #}                                                                                                                              

}