         addEventListener(MouseEvent.MOUSE_DOWN, mouseEventHandler);
         addEventListener(MouseEvent.MOUSE_UP, mouseEventHandler);
         addEventListener(MouseEvent.CLICK, mouseEventHandler);
-        addEventListener("enabledChanged", enableChangedHandler);
     }
     
     private function addSystemMouseHandlers():void

    {
        if (!flags.update(stickyHighlightingFlag, value))
            return;

        invalidateSkinState();
    }

    /**

        if (!flags.update(isHoveredOverFlag, value))
            return;

        invalidateButtonState();
    }

    /**
