.width causing mc to disappear

programming flash
1

When I use the following class in loading an image, I cannot use .width property

CLASS


package{
    import flash.display.*;
    import flash.events.*;
    import flash.net.URLRequest;

    public class loadImg extends Sprite {
        public function loadImage(imgURL:String) {
            var _loader:Loader = new Loader();
            _loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onComplete);
            var _request:URLRequest = new URLRequest(imgURL);
            _loader.load(_request);
            var mcImg:MovieClip = new MovieClip();
            mcImg.addChild(_loader);
            return mcImg;
        }
        private function onComplete(ev:Event):void {
            var loader:LoaderInfo = LoaderInfo(ev.target);
        }
    }
}

USAGE (try it with and without the .width = )


var _thumbURL:String = "http://www.jasonkenison.com/uploads/programs/icon_flash_lg.png";
var img:loadImg = new loadImg();
 var loadedImg:MovieClip = img.loadImage(_thumbURL);
loadedImg.width = 250;
addChild(loadedImg);