asp.net mvc - c# MVC Nested models not returning from views -

i have mastermodel class handles lot of data partial views across shared layouts. however, when try , return part of object (or entire mastermodel) in form, such "login", no data passed controller.

here part of mastermodel:

public class mastermodel {     public login login;     public account account;     public user user;      public mastermodel()     {         login = new login();         account = new account();         user = new user();     } } 

here part of login:

public class login {     public string email {get;set;}     public string passwordhash {get; private set;     public string fname {get;set;} } 

here part of master layout template calls partial view login:

@model models.mastermodel ... @{      html.renderpartial("../partials/_login", model.login); } ... 

and here _login partial:

@model models.login <div class="login-bar">      @if (model != null && !string.isnullorwhitespace(model.fname) )     {         var welcomestring = "welcome back, " + model.fname;         <p>@html.actionlink(welcomestring, "overview", "account")</p>     }     else     {         using (html.beginform("login", "account", formmethod.post))         {             @html.antiforgerytoken()              <p>                 @html.label("email address:")                 @html.editorfor(login => login.email, new { @class = "email" })                  @html.label("password:")                 @html.passwordfor(login => login.passwordhash)                 <input type="submit" value="login" class="button" />                  @if (viewbag.message != null)                 {                     <shim class="red">@viewbag.message.tostring()</shim>                 }             </p>         }     }  </div> 

here's accountcontroller httppost login too:

[httppost] [allowanonymous] [validateantiforgerytoken] public async task<actionresult> login(login login, string returnurl) {     var master = new mastermodel();     // modelstate valid. login.email = "" , login.passwordhash still default     if (modelstate.isvalid && (!string.isnullorempty(login.email) && !string.isnullorempty(login.passwordhash)))     {         var user = await usermanager.findasync(login.email, login.passwordhash);         if (user != null)         {             await signinasync(user, true);             master.user = user;             return redirecttoaction("overview", "account", master);         }     }     return view(master); } 

i've tried passing entire mastermodel partial view instead (also changing @model use models.mastermodel) whilst accessing login property mastermodel.login.email, etc, no avail.

it's got pretty simple i'm missing binding on property names, i'm starting go code blind now!

any ideas?

[update] - added accountcontroller

everything seems ok.. might try renaming parameter in login action besides login

public async task<actionresult> login(login model, string returnurl)

and maybe same in partial

@html.editorfor(model => model.email, new { @class = "email" })