[external asset] can't get width/height

[Stratboy]

Hi!

I've got a class, FileLoader, that loads swf. It dispatch an Event.COMPLETE.
There's a listener on Event.COMPLETE that add the swf to an empty movieclip called page.
Immediately after adding the swf to page, page dimensions still are == 0. Why?
If for ex. I then resize the window, I can retrieve them. Quite strange..

Can you help me please?

Here's the code:

//the container
var page = new MovieClip();
addChild(page);

function completeTest(e:Event){//Event.COMPLETE listener
	
	//delete old movie
	if(page.numChildren > 0){
		loader.unLoad(); //loader here is an instance of a class of mine called FileLoader. unLoad() calls unload() to the internal Loader instance.
		page.removeChildAt(0);
	}
	
	var swf = e.target.currentLoadedFile; //currentLoadedFile is a prop of FileLoader
	page.addChild(swf);
        //Here i cannot immediately retrieve page.width and page.height (they're == 0)
        //if I then for example, resize the window, then I can retrieve them.
}