_preloader error

programming flash
1

I’m getting an error from a file and its coming from my ‘loaderProgress’ function…everything actually loads in fine and it does what it is suppose to do so far, but after it loads everything in…it says: TypeError: Error #1009: Cannot access a property or method of a null object reference. at xml_2_fla::MainTimeline/loaderProgress()…

would anyone be able to tell me why i’m getting this error. Below is the code:

import flash.net.URLLoader;
import flash.net.URLRequest;
import flash.net.URLLoaderDataFormat;

var imgLoader:Loader;

function loaderProgress(eo:ProgressEvent):void {
var perc:Number = eo.bytesLoaded / eo.bytesTotal;
var percStrng:String = Math.ceil(perc * 100).toString() + “%”;
_straightLoader._innerLdr.scaleX = perc;
_percent.text = percStrng;
imgLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, _kill);
}

var xml:XML;
var xmlList:XMLList;
var xmlLoader:URLLoader = new URLLoader();
xmlLoader.addEventListener(Event.COMPLETE, xmlLoaded);
xmlLoader.load(new URLRequest(“data/images.xml”));

function xmlLoaded(e:Event):void {
xml = XML(e.target.data);
xmlList = xml.children();
trace(xmlList.length());

for (var i:int = 0; i < xmlList.length(); i++) {
    imgLoader  = new Loader();
    imgLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loaderProgress);
    imgLoader.load(new URLRequest(xmlList*.attribute("thumb")));
    imgLoader.x = 25;
    imgLoader.y = i * 150 + 15;
    addChild(imgLoader);
}

}

function _kill(e:Event):void {
// cleaning up the stage and file
//remove these from the stage after the load is complete
removeChildAt(getChildIndex(_percent));
removeChildAt(getChildIndex(_spinner));
removeChildAt(getChildIndex(_straightLoader));
// make sure that there is not action left on any objects that you can’t see
// i. e. here we had a looping movieClip, this will insure it still isn’t using memory
// i think!
_spinner.gotoAndStop(1);
_straightLoader.gotoAndStop(1);
// this just makes sure that they are equal to null and are ready for garbage collection
_spinner = null;
_percent = null;
_straightLoader = null;
}