Angular MVC Routing with Custom Controller

I have an Angular MVC app that has couple of controllers. Default and another custom controller that I added.

http://example.com/home/

http://example.com/ManageSummaryInfo/

All my business logic lies with ManageSummaryInfo Controller.

 routes.MapRoute(                        
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "ManageSummaryInfo", action = "HomePage", id = UrlParameter.Optional }
            );

In Angular Routing, I have it like this,

$routeProvider.when('/showsummary',
                        {
                            templateUrl: 'ManageSummaryInfo/ShowSummary',
                            controller: 'ShowSummaryController'
                        });
    $routeProvider.when('/showerror',
                        {                            
                            templateUrl: 'ManageSummaryInfo/ShowError',
                            controller: 'ShowErrorController'
                        });   
    $routeProvider.when('/showplatform',
                        {
                            templateUrl: 'ManageSummaryInfo/ShowPlatform',
                            controller: 'ShowPlatformController'
                        });

My Views are also configured around ManageSummaryInfo Controller, but when I run I get to the home page, after which I click on one of elements should take me to the next page. But, I dont get routed and I got 404 - The resource cannot be found.error.

This is how my views look,

Views
--ManageSummaryInfo
----HomePage.cshtml
----Index.cshtml
----ShowSummary.cshtml
----ShowError.cshtml
----ShowPlatform.cshtml

My question, is when we have controllers in our route (ie, http://example.com/ManageSummaryInfo/- how would Angular route things and why mine getting file not found error.

I'm new to C# MVC Framework. Am I missing something related to ASP.NEt Routing ?Any help would be appreciated. I have tried to be eloborate, but if you would need more info, I'm happy to provide more code(Pastebin or something.

Thanks in advance!

Edit:

Adding Controller Class as per request,

public class ManageSummaryInfoController : Controller
    {
        // GET: ManageSummaryInfo
        public ActionResult Index()
        {
            return View();
        }
        public ActionResult HomePage()
        {
            return View();
        }

        public ActionResult ShowPlatform()
        {
            return PartialView("ShowPlatform");
        }

        public ActionResult ShowSummary()
        {
            return PartialView("ShowSummary");
        }

        public ActionResult ShowError()
        {
            return PartialView("ShowError");
        }
    }