The virtual path 'TesteUserControl.ascx' maps to another application...

Min "server" crachar när jag kör denna applikation.

The virtual path 'TesteUserControl.ascx' maps to another application, which is not allowed. (På den röda raden)

Någon som vet vad felet är?

public partial class WebPartListControl : System.Web.UI.UserControl
{

   public override bool HasControls()
   {
      return true;
   }

   protected override ControlCollection CreateControlCollection()
   {
      ControlCollection controls = new ControlCollection(this);
      [B][red]Control x = LoadControl("TesteUserControl.ascx");[/red][/B]
      x.ID = "TesteUserControl.ascx";
      controls.Add(x);
      return controls;
   }
}