ActionScript 3.0 :: Event.target And Nested Movieclips?

I have a bunch of movie clips in my main timeline with at least 2 nested clips inside them, MyMc.nested1.nested2 etc. I have given the top most movie clips that sit on the main timeline instance names. In a document class I created a private variable typed as an array and placed all those MC names in that array. I then looped through the length of the array and assigned 2 event listeners to each instance. Example:

for (var i:uint = 0 ; i < _activities.length ; i++){    _activities[i].buttonMode = true;    _activities[i].addEventListener(MouseEvent.MOUSE_DOWN, pickUp);    _activities[i].addEventListener(MouseEvent.MOUSE_UP, dropIt);} 
 
in the event pickup() is were my trouble seems to come in.In the pickup function I have the following:
 
event.target.startDrag() 

This seems to work, but only on the lowest nested Movie clip......nested2I can use event.target.parent.parent.startDrag() and that seems to work.... Except when I place another movieclip in the second layer of the of the MyMC , if that is accidently clicked, it will now drag the Stage.I attempted to use the event.target.mouseChildren = false but that only seems to work on the lowest nested object... nested2 as that seems to be the one I am clickingIs there something I am missing to say, click only the top level mc then ignore all nested mc?