 
         private function _close() : void {
             Log.debug("cancel any manifest load in progress");
+            _closed = true;
             clearTimeout(_timeoutID);
             try {
                 _urlloader.close();

            return _flushLiveURLCache;
        }
    }
}
        /** Load the manifest file. **/
        public function load(url : String) : void {
            _close();
            _closed = false;
            _url = url;
            _levels = new Vector.<Level>();
            _current_level = 0;
