Code Optimization/Check for memory leaks help..

var video:Video = new Video(1280,720);
addChild(video);
 
var xml:XML;
var whoIs:Number = 0;
var firstTime:Boolean = true;
var curVideo:String;
 
var nc:NetConnection = new NetConnection();
nc.connect(null);
 
var ns:NetStream = new NetStream(nc);
ns.addEventListener(NetStatusEvent.NET_STATUS, onStatusEvent);
 
function onStatusEvent(stat:Object):void
{
	switch(stat.info.code){
		case "NetStream.Play.Stop" :
		
		if (whoIs<xml.video.length()-1){
		whoIs++	
		}else{
		ns.close()
		
		gotoAndPlay(2);
		}
	
		curVideo = xml.video.attribute("vName")[whoIs];	
		ns.play("http://www.site.com/videos/"+curVideo);
		
	}
}
					
var meta:Object = new Object();
meta.onMetaData = function(meta:Object)
{
	trace(meta.duration);
}
 
ns.client = meta;
 
video.attachNetStream(ns);
 
 
 
/* XML Loading Code and Intial Display of Rates and header */
 
var loader:URLLoader = new URLLoader();
loader.addEventListener(Event.COMPLETE, onLoaded);
 
function onLoaded(e:Event):void
{
	xml = new XML(e.target.data);
	curVideo = xml.video.attribute("vName")[whoIs];
	
	
	ns.play("http://www.site.com/videos/"+curVideo);
 
}
 
loader.load(new URLRequest("http://www.site.com/xml.asp?zid=3"));
 
stop();