Varför fungerar inte detta? AS3-Php?

    var myLoader:URLLoader = new URLLoader()
    myLoader.dataFormat = URLLoaderDataFormat.VARIABLES
    myLoader.load(new URLRequest("press.php"))
    myLoader.addEventListener(Event.COMPLETE, onDataLoad)
    function onDataLoad(evt:Event){

            for(var i:uint=1; i<evt.target.data.cant; i++){
            this["Title_txt"+i].htmlText  = evt.target.data["Title"+i]
            this["Comments_txt"+i].text = evt.target.data["Comments"+i]
	    var loader:Loader = new Loader()
            this["holder_mc"+i].addChild(loader)
            loader.load(new URLRequest(evt.target.data["Source"+i]))
			this["holder_mc"+i].addEventListener(MouseEvent.CLICK, navigateToURL(new URLRequest(evt.target.data["Url"+i])));
      	}