The PureMVC Framework Code at the Speed of Thought

I'm trying out multicore for the first time, and I'm relatively new to PureMVC.

I set up my code so that I have a main app and a module (both in the same project). 

Q. How can I send a notification from my module to the main app?  It seems like the ApplicationFacade classes handle the notification, but since I have two ApplicationFacades, how do I handle communication between them (without tightly coupling my module and my main app).

In the module I have a ViewMediator that calls (note: this applicationFacade is the main one):

  protected function showStatus( event:Event ):void
  {
    statusNav.appNavShell.setStatusMessage(StatusNav.SHOW_STATUS_MESSAGE); // works
    sendNotification(ApplicationFacade.VIEW_STATUS); // doesn't work.
  }

In the main app, I have another ViewMediator listening for this:

  override public function listNotificationInterests():Array
  {
     return [ ApplicationFacade.VIEW_STATUS
              ];
  }


Thanks,
KL