flex mx 启动加载问题

init();

creationComplete="callLater(init)"

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="callLater(init)">
<mx:Script>
<![CDATA[
import mx.controls.Image;


var img1:Image = new Image();


public function init():void{
trace("开始飘了啊!~~~");

img1.source="lingdang.jpg";
img1.width=40;
img1.x = 300;
img1.y = 300;
this.addChild(img1);

this.addEventListener(Event.ENTER_FRAME, movelingdang);

}

public function movelingdang(event:Event):void{
img1.x = img1.x + 1 ;
//this.removeEventListener(Event.ENTER_FRAME,movelingdang);
}


]]>
</mx:Script>

</mx:Application>