      *  @playerversion AIR 2.5
      *  @productversion Flex 4.5
      */ 
-    protected function addApplicationListeners():void
+    private function addApplicationListeners():void
     {
         // Add device event listeners
         systemManager.stage.addEventListener(KeyboardEvent.KEY_DOWN, deviceKeyDownHandler);

    //  Properties
    //
    //--------------------------------------------------------------------------

    //----------------------------------
    //  persistenceManager
    //----------------------------------

    }
    
    /**
     *  @private
     */ 
    private function deviceKeyDownHandler(event:KeyboardEvent):void
    {
        var key:uint = event.keyCode;
        
