Unloading / closing External SWF with button

1

I would be glad If You could help me with that problem, there are many post about it but it is not solve clearly.

I have got 2 files **main.swf, **picture.swf

My aim is to load picture.swf in main.swf and than close it using button that is place in picture.swf

AS code in main.swf looks like:

var imageRequest:URLRequest = new URLRequest (“picture.swf”);
var imageLoader:Loader = new Loader();
imageLoader.x = 352;
imageLoader.y = 144;
addChild(imageLoader);

function addClick(event:MouseEvent):void
{
imageLoader.load(imageRequest);
}
button1.addEventListener(MouseEvent.CLICK, addClick);

In picture.swf i create a button close_btn and here i have no idea what to do next …
i wonder to use lightbox but there are problems with it as well so I AM BARGING YOU FOR A HELP GUYS :confused: