Resize load image, text and buttons no scale...

I would like to ask for any idea to solve my problem.
I need to load the picture jpg into the main swf by xml.
During the viewing at the main swf, the picture has to resize according to the size of the window.
The other text and the buttons don't change the size, so no scale.
Thank you for any help.

See below ...

Where "bkgdMC" is the instance name of the empty movieclip you call your XML from.


Stage.align = "TL";
Stage.scaleMode = "noScale";

var stageListener:Object = new Object();
Stage.addListener(stageListener);

setBackground();

stageListener.onResize = function() {
setBackground();
};

function setBackground() {

var middleX = Stage.width/2;
var middleY = Stage.height/2;

bkgdMC._x = topX;
bkgdMC._y = leftY;


bkgdMC._width = Stage.width;
bkgdMC._height = Stage.height;

bkgdMC._xscale = bkgdMC._yscale = Math.max(bkgdMC._xscale, bkgdMC._yscale);
}