[ASK] BAGAIMANA CARA UNLOAD XML di flash as3

import fl.video.*;

var thumb_width:Number = 50; // The width of your thumbnail graphics
var thumb_height:Number = 30; // The height of your thumbnail graphics
var thumbs_x:Number = 300; // The space on the left side of the thumbnails
var thumbs_y:Number= 750; // The space from the top of the interface to the row of thumbnails
var video_x:Number = 300; // The space to the left side of the video player
var video_y:Number =180; // The space above video player
var myVideos:XMLList;
var myTotal:Number;
var myContainer:Sprite;
var myThumbs:Sprite;
var myTitles:Sprite;
var myPlayer:FLVPlayback;

var myXMLLoader:URLLoader = new URLLoader();
myXMLLoader.load(new URLRequest("link/p.xml"));
myXMLLoader.addEventListener(Event.COMPLETE, processXML);
/*/\myXMLLoader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, onError);*/

function onError(e:IOErrorEvent):void {
// Do nothing
}
/*myXMLLoader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, onmyXMLLoadError);*/

/*myLoader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, loaderIOErrorHandler);*/
function processXML(myEvent:Event):void {
var myXML:XML = new XML(myEvent.target.data);
myVideos = myXML.video;
myTotal = myVideos.length();
myXMLLoader.removeEventListener(Event.COMPLETE, processXML);
myXMLLoader=null;
makeContainers();
callThumbs();
makePlayer();
}
function makeContainers():void {
myContainer = new Sprite();
addChild(myContainer);
myThumbs = new Sprite();
myThumbs.addEventListener(MouseEvent.CLICK, playVideo);
myThumbs.x = thumbs_x;
myThumbs.y = thumbs_y;
myThumbs.buttonMode = true;
/*myThumbs.addEventListener(MouseEvent.MOUSE_OVER, onOver);
myThumbs.addEventListener(MouseEvent.MOUSE_OUT, onOut); */
myContainer.addChild(myThumbs);
myTitles = new Sprite();
myTitles.x = thumbs_x;
myTitles.y = thumbs_y;
myContainer.addChild(myTitles);
}
function callThumbs():void {
for (var i:Number = 0; i < myTotal; i++) {
var thumb_url = myVideos[i]. @thumb;
var myThumbLoader = new Loader();
myThumbLoader.name = i;
myThumbLoader.load(new URLRequest(thumb_url));
myThumbLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, thumbLoaded);
myThumbLoader.x = (thumb_width+10)*i;

var thumb_title = myVideos[i]. @title;
var title_txt:TextField = new TextField();

var myFormat:TextFormat = new TextFormat();
myFormat.align = TextFormatAlign.CENTER;
myFormat.size = 12;
myFormat.bold = true;
myFormat.font = "_sans";
// additional formating can be added as needed

title_txt.text = thumb_title;
title_txt.x = myThumbLoader.x+10;
title_txt.y = thumb_height + 5;
title_txt.width = thumb_width - 20;
title_txt.height = thumb_height;
title_txt.wordWrap = true;

myTitles.addChild(title_txt);
title_txt.setTextFormat(myFormat);
}
}

function thumbLoaded(myEvent:Event):void {
var myThumb:Loader = Loader(myEvent.target.loader);
myThumbs.addChild(myThumb);
}

function makePlayer():void {
myPlayer = new FLVPlayback();
myPlayer.skin = "SkinUnderPlaySeekFullscreen.swf";
myPlayer.skinBackgroundColor = 0xAEBEFB;
myPlayer.skinBackgroundAlpha = 0.5;
myPlayer.skinAutoHide = true;
myPlayer.x = video_x;
myPlayer.y = video_y;
myPlayer.width = 852;
myPlayer.height = 480
myContainer.addChild(myPlayer);
myPlayer.source = myVideos[0]. @ url;
}

function playVideo(myEvent:MouseEvent):void {
var video_url = myVideos[myEvent.target.name].@url;
myPlayer.source = video_url;
}




load_btn.addEventListener(MouseEvent.CLICK, onClick);
function onClick(MouseEvent):void {//nama fungsi ini harus sama denganyg di atas
//melakukan action ketika 'myButton di klik'
removeChild(makePlayer);
delete makePlayer;
//makePlayer.unload();

gotoAndStop(3);
}