KErrCouldNotConnect - Loading CFbsBitmap in Thread

Hi could some one please explain why I get KErrCouldNotConnect when I try loading a CFbsBitmap in Thread

TInt err2 = bitmap->Load(aFileName, bmpId);.

Here is the code.

TInt res = KErrNone;
User::LeaveIfError( res = ProcessPhotos.Create( _L("ProcessPhotos") ,CMyApplication::StartAppThreadFunction,16384,1024*1024,1024*1024,this));
   
ProcessPhotos.SetPriority(EPriorityNormal);
ProcessPhotos.Resume();


TInt CMyApplication::StartAppThreadFunction(TAny* aParam)
{
   CTrapCleanup * cleanup = CTrapCleanup::New();
   TInt err;
   if( cleanup == NULL )
   {
      err = KErrNoMemory;
   }
   else
   {
      TRAP( err, StartAppThreadFunctionL(aParam) );
   }
   delete cleanup;
   return err;
}

void CMyApplication::StartAppThreadFunctionL(TAny* aParam)
{
   CMyApplication *engine = static_cast<CMyApplication*>(aParam);

   CFbsBitmap* bitmap = new (ELeave) CFbsBitmap();
   CleanupStack::PushL(bitmap);
   
   _LIT(aFileName,"E:\\Images\\Library\\2003\\5\\1\\41s.mbm");
   TInt bmpId = 0;
   
   TInt err2 = bitmap->Load(aFileName, bmpId); // error here

   CleanupStack::PopAndDestroy();
      
}


thanks