[CS3] ADDED_TO_STAGE eventlistener not triggering

Hey guys, I am new to actionscripting, and am trying to get an xml slideshow to work. I have read a number of tutorials online and looked at a few variations of the xml slideshow. I have the xml loading fine, and pushed into an array. The next step I want it so take is drop a container for the bitmaps onto the stage, and proceed when that is done via the ADDED_TO_STAGE event listener, but it is not triggering. I have isolated the bit of code into another program, and it looks fine to me but the trace does not go off, so I assume that either nothing is going onto the stage, or the event is not triggering properly. here is the code (for AS 3.0):

var container:Sprite = new Sprite();
addChild(container);
addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);

function onAddedToStage(event:Event):void
{
trace(container);
}

I have seen something almost exactly the same work in other code. Any ideas what is wrong with this code? Any help would be greatly appreciated.

sgtscience