So you can see the query and try it in phpmyadmin change your code to this:
PHP Code: 
$newName $_POST['sName']; 
                    
$newUrl $_POST['sURL']; 
                    
$newRate $_POST['sRate']; 
                    
$newEmail $_POST['sEmail']; 
                    
$reason $_POST['sReason']; 
                    
$q "update wcddl_sites set name='$newName',url='$newUrl',rate='$newRate',email='$newEmail' WHERE id='"mysql_real_escape_string($sid) ."'";
                    echo 
"query is : $q";
                    
mysql_query($q);