ASP.NET MVC post method parameter is always nothing (null) -

i'm sending json asp.net mvc sencha touch:

ext.ajax.request({     url: 'http://localhost:52771/api/login',     method: 'post',     headers: {              'content-type': 'application/json'                },           params: {             post: json.stringify({                     user: username,                     pwd: password                 })         },     },     success: function (response) {          var loginresponse = ext.json.decode(response.responsetext);          if (loginresponse === true) {             // server send token can used throughout app confirm user authenticated.             me.sessiontoken = loginresponse.sessiontoken;             me.signinsuccess();     //just simulating success.         } else {             me.signinfailure(loginresponse.message);         }     },     failure: function (response) {         me.sessiontoken = null;         me.signinfailure('login failed. please try again later.');     } }); 

here service code:

   namespace simplesevice public class logincontroller     inherits apicontroller      private shared list ilist(of login1) = new list(of login1)( _               {new login1() {.user = "user", .pwd = "password"}, _                new login1() {.user = "user1", .pwd = "password1"}, _                new login1() {.user = "user2", .pwd = "password2"}                }     )      public function getlogin() ienumerable(of login1)         return list     end function      <system.web.http.httppost> _     public function postlogin(byval login login1) net.http.httpresponsemessage         if login.user = "john" andalso login.pwd = "human"             return request.createresponse(of boolean)(net.httpstatuscode.ok, true)         end if         return request.createresponse(of boolean)(net.httpstatuscode.notfound, false)     end function  end class 

end namespace

here http traffic:

    request url:http://localhost:52771/api/login?_dc=1391752685427 request method:post status code:500 internal server error request headers accept:*/* accept-encoding:gzip,deflate,sdch accept-language:ru-ru,ru;q=0.8,en-us;q=0.6,en;q=0.4 connection:keep-alive content-length:53 content-type:application/json host:localhost:52771 origin:http://localhost:1841 referer:http://localhost:1841/login/ user-agent:mozilla/5.0 (windows nt 6.1) applewebkit/537.36 (khtml, gecko) chrome/32.0.1700.107 safari/537.36 x-requested-with:xmlhttprequest query string parametersview sourceview url encoded _dc:1391752685427 request payload post=%7b%22user%22%3a%22t%22%2c%22pwd%22%3a%22y%22%7d response headers access-control-allow-origin:http://localhost:1841 cache-control:no-cache content-length:900 content-type:application/json; charset=utf-8 date:fri, 07 feb 2014 05:58:18 gmt expires:-1 pragma:no-cache server:microsoft-iis/8.0 x-aspnet-version:4.0.30319 x-powered-by:asp.net x-sourcefiles:=?utf-8?b?rdpcc2vuy2hhxfnpbxbszvnldmljzvxtaw1wbgvtzxzpy2vcyxbpxgxvz2lu?= 

i'm getting login nothing.

asp.net mvc , asp.net web api 2 different frameworks. can sit side side in same project use different set of classes. attributes using on actions in apicontroller mvc namespace, hence not valid.