Listener not working

1 

var cuepoint = new Object();
ASBroadcaster.initialize(cuepoint);
var trigerCuePoint = new Object();
cuepoint.addListener(trigerCuePoint);
trigerCuePoint.onUpdateCue = function(point) {
	trace("point :"+point);
	trace("WORKING");
};
cuepoint.broadcastMessage("onUpdateCue", "Why is this not working");

I’m trying to figure out this listener business.
Why does this not work.

Thanks