Somethings wrong with a custom event

[treblereel]

Hi all, plz help me to find out whats wrong with my custome event SimpleEvents.AlertEvent, coz nothing happens

Here is a test EntryPoint:

public class EventsTest implements EntryPoint {
    private SimpleWindow simpleWindow3;
    private SimpleWindow simpleWindow2;
    private Button btn;
    private Observable Observable;
    
    
    public void onModuleLoad() {
        RootPanel rootPanel = RootPanel.get();
   
        
        SimpleWindow simpleWindow = new SimpleWindow();
        
        btn = new Button("Process");
        btn.addListener(Events.Select,new Listener<ButtonEvent>() {
             @Override public void handleEvent(ButtonEvent be) {


// Here i am trying to fire event SimpleEvents.AlertEvent

                 EventBus.getInstance().fireEvent(SimpleEvents.AlertEvent);
  
               }  
            });
        
        
    
        simpleWindow.addButton(btn);
        
        rootPanel.add(simpleWindow);
        
        
        simpleWindow2 = new SimpleWindow("First");

// i have add listener SimpleEvents.AlertEvent to catch Event from above

        simpleWindow2.addListener(SimpleEvents.AlertEvent,new Listener<BaseEvent>(){
            @Override    public void handleEvent(BaseEvent be) {
                System.out.println("Event First");
                simpleWindow2.setHeading("changed ");
            }
            
        });
        
        rootPanel.add(simpleWindow2);
   
    }

} 

EventBus:

public class EventBus  extends BaseObservable{
    private static EventBus instance;
    
    
    protected EventBus(){
        super();
        
    }
    
    
    public static EventBus getInstance(){
        instance = (instance == null ? (instance = new EventBus()) :
                instance);
        return instance;
        
    }

} 

SimpleEvents:

public class SimpleEvents {
    
    public static final EventType AlertEvent = new EventType(); 

} 

Thanks for any help

[sven]

What is SimpleWindow? Is simpleevent listening to the EventBus? Because else you add the listener to the wrong Observable.