stop();

this.addEventListener(Event.ENTER_FRAME, loading);

function loading(e:Event):void{

var total:Number = this.stage.loaderInfo.bytesTotal;
var loaded:Number = this.stage.loaderInfo.bytesLoaded;

lbar.scaleX = loaded/total;
loader_txt.text = Math.floor((loaded/total)*100)+ "%";

if (total == loaded){
gotoAndPlay(2);
this.removeEventListener(Event.ENTER_FRAME, loading);
}

}

can solve the IE reload problem

flash preloader for AS3

ActionScript 3