รบกวนถามหน่อยว่าคือจะทำ flash ให้มี progressbar component แต่ทำไม่ได้

var imgurl:String = "C:/Documents and Settings/All Users/Documents/My Pictures/Sample Pictures/Winter.jpg";
var myrequest:URLRequest = new URLRequest(imgurl);

myloader.scaleContent = true;
myloader.load(myrequest);

pbar.source = myloader;
pbar.addEventListener(ProgressEvent.PROGRESS,loadprogress);
pbar.addEventListener(Event.COMPLETE,loadcomplete);

function loadprogress(event:ProgressEvent):void{
	percenttxt.text = int(event.currentTarget.percentComplete) + " %";
}
function loadcomplete(event:Event):void{
	pbar.removeEventListener(ProgressEvent.PROGRESS,loadprogress);
	pbar.removeEventListener(Event.COMPLETE,loadcomplete);
	removeChild(pbar);
	percenttxt.text = "";
}