Load GUI in Offline

General
1

Hi,

I am trying to load
GUI in offline.

According to Vaadin book, I created
EntryPoint
, registed it in my
BLAWidgetset.gwt.xml

and implemented
onModuleLoad()
method:

public class BLAEntryPoint implements EntryPoint {

@Override
public void onModuleLoad() {
RootPanel panel = RootPanel.get("package-807062458");
   if(panel != null) {
       panel.add(my GUI);
   }
}

What happend is that the
my GUI
 is
shown just for few seconds
 and than it is replaced by gray screen with very small ajax status icon in the right top corner.

Thanks for any help!