Find control problem

I am loading two user controls at runtime.


 Control mailTemplate = LoadControl("test.ascx");                mailTemplate.Controls.Add(LoadControl("KnowledgeBase.ascx"));

 Control mailTemplate = LoadControl("test.ascx");
               mailTemplate.Controls.Add(LoadControl("KnowledgeBase.ascx"));
After loading, i tried to find the child elements in common control mail template.
  HtmlSelect pro = (HtmlSelect)mailTemplate.FindControl("Ddl_projects");
this Ddl_projects control is in test.ascx usercontrol. It was found, no pr ...