ActionScript 3.0 :: HitTest With Movie Clip?

I'm making a droid (bad guy) move down the screen. If it hits the robot (good guy) the baseHealth will go down 2, same if it hits the bottom of the screen. If it hits the beam movie clip then it will go to the top of the screen and continue downward. The beam movie clip is a laser that slowly move outward, and I want the droid to go to the back of the screen if it ever touches any frame of the beam. However, when the droid touches the beam nothing happens, though it seems to work when it touches the robot or hits the bottom of the screen.

Code:
addEventListener(Event.ENTER_FRAME, moveDroid);
function moveDroid(e:Event):void{[code]....