Drilling down into movie clips

I created a menu movie clip that hold various buttons inside it. The whole container is called menu_mc, and lets say I want to access home_mc only and add a URLRequest to that. In AS2.0 I remember it was something like
menu_mc.home_mc.addEventListener(MouseEvent.CLICK,functionname); Why is it that when I click on menu_mc I get the URLRequest on that movie clip and not the one inside it? Here is the code for this. Thanks guys.