Help on setting the depth!

Need some help guys!!

I had this code to load a swf file outside the original .fla while the button is clicked.
Everything works ok But when I add a background layer on the original .fla, the loaded swf is behind my background. What should I do to bring the loaded swf to the front???

Thanks in advance!!


var loader:Loader = new Loader();

button1.addEventListener( MouseEvent.MOUSE_OVER, mouseOverHandler);

function mouseOverHandler( e:MouseEvent ):void {
	
	var url:String;
	var buttonOver:Sprite = e.currentTarget as Sprite;
	
	if( buttonOver == button1 ){
		url = "./Intro1.swf"
	} else if (  buttonOver == button2  ){
		url = "./Intro2.swf"
	}
	
	//create a request
	var request:URLRequest = new URLRequest(  url );
	
	if( loader ){
		TweenLite.to( loader, 1, { y:stage.stageHeight, ease:Quart.easeOut, onComplete:startLoad, onCompleteParams:[request]  } );
	}
}