c# - Cannot pass a repository parameter to a specific controller -

i using simple membership account registration , need store data when user registers. i'm using ninject dependency injection , have repository gets list of states populate dropdownlist. can pass parameter constructor in other controllers works fine. however, returns null when try pass account controller. obviously, there difference between controller , others can't figure out might be. how passing repository parameter constructor.

public class accountcontroller : controller {  private readonly istaterepository srepository;  public accountcontroller(istaterepository srepo) {     srepository = srepo; }  public actionresult register(registermodel model)     {          var statequery = srepository.states.select(m => new selectlistitem         {              value = sqlfunctions.stringconvert((double)m.stateid),             text = m.state1,             selected = m.stateid.equals(0)         });          model.statelist = statequery.asenumerable();           //more code submit registration           return view(model);     } }   public class registermodel {     [required]     [display(name = "user name")]     public string username { get; set; }      [required]     [stringlength(100, errormessage = "the {0} must @ least {2} characters long.", minimumlength = 6)]     [datatype(datatype.password)]     [display(name = "password")]     public string password { get; set; }      [datatype(datatype.password)]     [display(name = "confirm password")]     [system.componentmodel.dataannotations.compare("password", errormessage = "the password , confirmation password not match.")]     public string confirmpassword { get; set; }      [required]     [display(name = "address")]     public string address1 { get; set; }       [display(name = "apt #")]     public string address2 { get; set; }      [required]     [display(name = "city")]     public string city { get; set; }      [required]     [display(name = "state")]     public string state { get; set; }      [required]     [display(name = "zip")]     public string zip { get; set; }      public string stateid { get; set; }     public ienumerable<selectlistitem> statelist { get; set; } } 

dropdownlist register view

@html.dropdownlistfor(model => model.stateid, model.statelist) 

repository interface

 public interface istaterepository {     iqueryable<state> states { get; } } 

repository

public class efstaterepository : istaterepository {     //private efdbcontext context = new efdbcontext();     private entities context = new entities();      public iqueryable<state> states     {         { return context.states; }      } } 

binding

ninjectkernel.bind<istaterepository>().to<efstaterepository>(); 

has else had problem? edited add - gratefully received people have not had problem, have suggestions. :-)