请教一个与数据库互传数据的问题

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代码:

public function dbRequest():void{
            var myURL:String="http://q.tgbus.com/rank/LZGTHandler.ashx?ID=6E729FD5F5AB01EC";
            trace("myURL = " + myURL);
            var myLoader:URLLoader=new URLLoader;
            var myReq:URLRequest=new URLRequest(myURL);
            myReq.method=URLRequestMethod.POST;
            myLoader.dataFormat=URLLoaderDataFormat.VARIABLES;
            myLoader.load(myReq);
            myLoader.addEventListener(Event.COMPLETE,onURLLoaded);
            myLoader.addEventListener(IOErrorEvent.IO_ERROR,onError);
        }
        private function onURLLoaded(e:Event):void{
            var myLoader:URLLoader=URLLoader(e.target);
            trace(myLoader.data);
            var db:String=myLoader.data.code;
            trace(db);
        }