MYSQL error while inserting data using php

I am practicing php and sql. at a stage when I'm trying to enter a record into a table with 2 exiting records. but it doesn't add and show an error

"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '=('Aqeela','Nasreen','Hakeem Chattah')' at line 1"

Why is it not entering a record in data base. Is there any syntax error?

$username="root";
$pass="";
$database="addressbook";
$server="127.0.0.1";

$con=mysql_connect($server,$username,$pass);
$db_found=mysql_select_db($database,$con);
if($db_found)
{
$sql_insert="INSERT INTO table_address_book(f_name,l_name,address) VALUES=('Aqeela','Nasreen','Hakeem Chattah')";
    $result=mysql_query($sql_insert);
    if(!$result){
        print "sorry cannot proceed your request<br>".mysql_error();

        }
else
{
//  print "recorded entered successfuly<br>";
//  print "now dATABASES AFTER EDITING ARE<BR><br>";
    $new_sql="SELECT*FROM table_address_book";
    $result_after_editing=mysql_query($new_sql);
    while($db_field_edited=mysql_fetch_assoc($result_after_editing))
    {
        print $db_field_edited['ID']."<br>";
        print $db_field_edited['f_name']."<br>";
        print $db_field_edited['l_name']."<br>";
        print $db_field_edited['address']."<br>";
        print "<BR><BR><BR>";


        }
        mysql_close($con);
    }
}
else
{
    die("unable to connect database ".mysql_error());
    }