asp.net mvc 4 - MVC Form action method gets overwritten -

i have following razor form:

@model @using (html.beginform("resetpassword", "user", formmethod.post, new { @class = "form-horizontal", role = "form" })) {     @html.antiforgerytoken()     @html.hidden("guid", viewdata["guid"]) ....ect contains model , 1 hidden field 

when hit page must pass guid following way:

user/resetpassword/8c5f38cc-c8db-46b4-80f5-169699d8a583 

i hit action controller expected:

 public actionresult resetpassword(string id)         {             viewbag.title = @ddhelper.getcontent("user_password_reset_new") + " " +                 @ddhelper.getcontent("slogan") + " " + @ddhelper.getmeta("sitename");              if (id != null)             {                 guid pwid = new guid();                 if (guid.tryparse(id, out pwid))                 {                     if (usermanager.getresetpassworduser(pwid) != null)                     {                         viewdata["guid"] = id;                         return view(new models.user());                     }                 }             }             return view();         } 

now when @ html razor produced see:

<form action="/user/resetpassword/8c5f38cc-c8db-46b4-80f5-169699d8a583" class="form-horizontal" method="post" role="form"> 

when post form want hit action:

[httppost] [validateantiforgerytoken] public actionresult resetpassword(models.user pwuser) {     string guid = request["guid"];     string password = pwuser.password;      guid pwid = new guid();      if (guid.tryparse(guid, out pwid))     {                      usermanager.resetuserpassword(password,pwid);         return redirecttoaction("logon");     }      return view(guid); } 

now when post form hit cshtml again , not hitting action because action

/user/resetpassword/8c5f38cc-c8db-46b4-80f5-169699d8a583 

does not exsist , everytime hits page guid different. how can tell html.beginform not write parameters in action name? , why razor behaving this?