     private function creationCompleteHandler(event:Event):void
     {
         addEventListener(Event.ENTER_FRAME, enterFrameHandler);
-        _nativeWindow = systemManager.stage.nativeWindow;
     }
     
     /**

    //  Overridden methods: UIComponent
    //
    //--------------------------------------------------------------------------


    /**
     *  @private
     */

            return "disabled";

        if (nativeWindow.active)
            return enabled ? "normal" : "disabled";
        else
            return enabled ? "normalInactive" : "disabledInactive";

