         stub = false;
         
         // Hook in UIComponentAccProps setup here!
-        master.accessibilityProperties = new AccessibilityProperties();
+        if (!master.accessibilityProperties)
+            master.accessibilityProperties = new AccessibilityProperties();
         
         // Hookup events to listen for
         var events:Array = eventsToHandle;

     */
    private static const EVENT_OBJECT_NAMECHANGE:uint = 0x800C;
    
    //--------------------------------------------------------------------------
    //
    //  Class methods

     */
    protected function get eventsToHandle():Array
    {
        return [ "errorStringChanged", "toolTipChanged", "show", "hide" ];
    }
    
    //--------------------------------------------------------------------------
