AS3: no carga en ie7, pls help

[ezra.wong]

aqui esta mi codigo, espero sirve de algo:

import fl.transitions.Tween;
import fl.transitions.TweenEvent;
import fl.transitions.easing.*;

stop();

this.loaderInfo.addEventListener(ProgressEvent.PRO GRESS, handleProgress);
this.loaderInfo.addEventListener(Event.COMPLETE, moveOn);

var tweenLoader:Tween;

function handleProgress(e:ProgressEvent){
var percent:Number=
Math.ceil((e.bytesLoaded/e.bytesTotal)*100);
cargador.theMask.scaleX=percent/100;
}

function moveOn(e:Event){
tweenLoader=
new Tween(cargador, "alpha", None.easeInOut, 1, 0, 15);
tweenLoader.addEventListener(TweenEvent.MOTION_FIN ISH, avanzar);

function avanzar(e:TweenEvent){
play();
}
}