         this.destFunc = destFunc;
         this.destString = destString;
 
-        isEnabled = true;
+        _isEnabled = true;
         isExecuting = false;
         isHandlingEvent = false;
         hasHadValue = false;

    {
        if (!isEnabled)
        {
            return;
        }


	 *  that re-executes the the binding.
     */
    mx_internal var isHandlingEvent:Boolean;
    
    /**
     *  @private
     *  Queue of watchers that fired while we were disabled.
     *  We will resynch with our binding if isEnabled is set to true
     *  and one or more of our watchers fired while we were disabled.
     */
    mx_internal var disabledRequests:Dictionary;

	/**
 	 *  @private
