c# - Controller action never calls -

after redirect facebook getting code token , when facebook redirect me, app stop responding, action, should called never fires up. problem?

my routes

routes.maproute(   "enter facebook return",   "enter/facebook/return",    new { controller = "users", action = "facebookreturn" } //callback action, not called -> problem );   routes.maproute(     "enter facebook",     "enter/facebook",     new { controller = "users", action = "facebook" }  ); 

and controller

    public actionresult facebook()     {         oauth2 facebook = new oauth2(             configurationmanager.appsettings["oauth_facebook_id"].tostring(),              configurationmanager.appsettings["oauth_facebook_secret"].tostring(),              configurationmanager.appsettings["oauth_facebook_authorize"].tostring(),              configurationmanager.appsettings["oauth_facebook_access"].tostring(),              configurationmanager.appsettings["oauth_facebook_return"].tostring()         );          session["enter_facebook"] = facebook; // save data session          dictionary<string, string> p = new dictionary<string, string> { { "scope", "email" } };          string redirecturl = facebook.getauthcode(p); //redirect url          //redirect url looks https://www.facebook.com/dialog/oauth?client_id=111111111&response_type=code&redirect_uri=http%3a%2f%localhost.loc%2fenter%2ffacebook%2freturn&scope=email          return redirect(redirecturl);     }      public actionresult facebookreturn(string code)     {         if (!string.isnullorempty(code))         {             //after returning             oauth2 facebook = (oauth2)session["enter_facebook"];             facebook.code = code; //getting code             dictionary<string, string> p = new dictionary<string, string> { { "client_secret", configurationmanager.appsettings["oauth_facebook_secret"].tostring() } }; //additional params              oauth2token token = facebook.getaccesstoken(p, oauth2.accesstokentype.dictionary); //getting marker access             string access_token = token.dictionary_token["access_token"];             if (!string.isnullorempty(access_token))             {                 string user_data = oauth2userdata.getfacebookuserdata(access_token); //getting data user                 string = "";             }          }          return view("enter");     } 

my livehhttpheader

get https://www.facebook.com/dialog/oauth?client_id=111111111&response_type=code&redirect_uri=http%3a%2f%localhost.loc%2fenter%2ffacebook%2freturn&scope=email  host: www.facebook.com user-agent: mozilla/5.0 (windows nt 6.1; rv:23.0) gecko/20100101 firefox/23.0 accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 accept-language: ru-ru,ru;q=0.8,en-us;q=0.5,en;q=0.3 accept-encoding: gzip, deflate dnt: 1 referer: http://localhost.loc/enter connection: keep-alive 

so @ end of see when click on "login facebook":

1.https://www.facebook.com/dialog/oauth?client_id=111111111&response_type=code&redirect_uri=http%3a%2f%localhost.loc%2fenter%2ffacebook%2freturn&scope=email

2.http://localhost.loc/enter/facebook/return?code=2222222222

3.my app stopped here, facebookreturn(string code) never called, can't address in p.2 (sign in firefox loading , never ends), if call p.2 without redirect fine

so question is: why after redirecting facebook site action never calles , seems in application pool problems