Mousewheel on AS2 tree component

1

Hi, can someone help me get the mousewheel working with my tree component?

I have this code - but it doesn’t seem to work. hmmmm
[AS]var mouseListener:Object = new Object();
mouseListener.onMouseWheel = function(delta) {
trace(delta);
trace(‘hello’);
}
Mouse.addListener(mouseListener);[/AS]