iframe facebook application

Question

hey

i am trying to build facebook iframe application using the Facebook Developer Toolkit 3.01 asp.net c#.

i am working by the ifrmae sample of the toolkit can be download here. www.facebooktoolkit.codeplex.com/releases/view/39727

this is my facebook application that is the same as the iframe sample. http://apps.facebook.com/alefbet/

this is my code, it has 2 pages, master page and default. this 2 pages are the same as the iframe sample.

1) this is the master page.

public partial class IFrameMaster : Facebook.Web.CanvasIFrameMasterPage
{
  public IFrameMaster()
  {
     RequireLogin = true;
  }
}

2) this is the default.aspx

public partial class Default : System.Web.UI.Page
{
  private const string SCRIPT_BLOCK_NAME = "dynamicScript";

  protected void Page_Load(object sender, EventArgs e)
  {
    if (IsPostBack)
    {
      if (Master.Api.Users.HasAppPermission(Enums.ExtendedPermissions.email))
      {
       SendThankYouEmail();
      }
      Response.Redirect("ThankYou.aspx");
   }
   else
   {
     if (Master.Api.Users.HasAppPermission(Enums.ExtendedPermissions.email))
     {
      emailPermissionPanel.Visible = false;
     } 
    CreateScript();
   }
}

  private void SendThankYouEmail()
  {
   var subject = "Thank you for telling us your favorite color";
   var body = "Thank you for telling us what your favorite color is. We hope you have 
   enjoyed using this application. Encourage your friends to tell us their favorite 
   color as well!";
   this.Master.Api.Notifications.SendEmail(this.Master.Api.Session.UserId.ToString(),
   subject, body, string.Empty);
  }

  private void CreateScript()
  {
   var saveColorScript =
     @"
     function saveColor(color) 
     {
      document.getElementById('" + colorInput.ClientID + @"').value = color;
     }
     function submitForm() 
     {
      document.getElementById('" + form.ClientID + @"').submit();
     }

     ";

   if (!ClientScript.IsClientScriptBlockRegistered(SCRIPT_BLOCK_NAME))
   {
    ClientScript.RegisterClientScriptBlock(this.GetType(), SCRIPT_BLOCK_NAME, 
    saveColorScript);
   }
  }
}

my directory structure is

1)the master page is in the root.

2)the default.aspx is in the root/alfbet directory.

3)i have also have the xd_receiver.htm inside root/channel directory.

that inside the master page their is the folowing line:

<script type="text/javascript">
    FB_RequireFeatures(["XFBML"], function() {
    FB.Facebook.init("c81f17ee4d4ffc5113c55f8b99fdcab5", "channel/xd_receiver.htm");
    });
</script>

the problem is that the applicatin dosent work

apps.facebook.com/alefbet/default.aspx

why it dosent work ? please help me and others who also obstacle in this issue.

i tryied lots of things, one of them was to display the user id. for that i put label in the default.aspx and wrote

lblTest.Text = Master.Api.Users.GetInfo().uid.ToString();

and it dosent event get to this line. i know it because it keeps display in the label.text the word "label"

thank you very much.