addchild browser resize

Hey Guys! I got my external swf to center...However, when I resize my browser the external swf dissapears off the screen (I can still hear it's music though) Anybody have any suggestions? Heres my class code:

package {
     
     import flash.display.Sprite;
     import flash.display.Loader;
     import flash.net.URLRequest;
     import flash.events.Event;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;
     
     public class Main extends Sprite{

          private var container:Sprite;
          
          public function Main(){
               
               container = new Sprite();     
               this.addChild(container);
               var url:URLRequest = new URLRequest("index2.swf");
               var loader:Loader = new Loader();
               loader.load(url);
               loader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler);
               
               this.stage.scaleMode = StageScaleMode.NO_SCALE;
            this.stage.align = StageAlign.TOP_LEFT;
          }
          
          private function completeHandler(event:Event):void{               
               this.addChildAt(bg,0)
               this.container.addChild(event.target.content);
               this.container.x = this.stage.stageWidth/2 - event.target.width /2;
               this.container.y = this.stage.stageHeight/2 - event.target.height /2;
               bg.width = stage.stageWidth;
               bg.height = stage.stageHeight;
               bg.x = 0
               bg.y = 0

               
               this.stage.addEventListener(Event.RESIZE, resizeHandler);
          }
          
          private function resizeHandler(event:Event):void{
               this.addChildAt(bg,0)
               this.container.x = this.stage.stageWidth/2 - event.target.width /2;
               this.container.y = this.stage.stageHeight/2 - event.target.height /2;
               bg.width = stage.stageWidth;
               bg.height = stage.stageHeight;
               bg.x = 0
               bg.y = 0
          }
     }
}