AS3 加载外部SWF资源

swf 内部库如下

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Chat影片剪辑内有三个组建，TextArea,TextInput,Button,实例名非别是:textAtea,textInput,sendButton

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Main.as

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package
{
	import flash.display.Loader;
	import flash.display.LoaderInfo;
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.net.URLRequest;
	
	
	
	public class Main extends MovieClip
	{
		
		
		public function Main()
		{
			
			var swfLoader:Loader = new Loader();
			var urlRequest:URLRequest = new URLRequest("asset.swf");
			swfLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,onComplete);
			swfLoader.load(urlRequest);
			
			
			
			
			
		}
		
		private function onComplete(e:Event):void{
			var l:LoaderInfo = e.target as LoaderInfo;
			var Chat:Class = l.applicationDomain.getDefinition("Chat") as Class;
			var chat:MovieClip = new Chat() as MovieClip;
			var sendButton:* = chat.getChildByName("sendButton");
			var textArea:* = chat.getChildByName("textArea");
			var textInput:* = chat.getChildByName("textInput");
			
			sendButton.label = "send";
			chat.x = 100;
			chat.y = 50;
			
			this.addChild(chat);
			
		}
		
		
	}
}