hitTest issues

Ive started writing the 'hitTest' code for the game, i wasnt sure how, since i hadnt' tried it before- but after a short tutorial it's simple enough. However, i am running into problems.

Currently, my stage is set up with a ship, that fires bullets, at the top of the stage, i have a long movie clip that will act as a 'wall', when the bullets collide with the wall they should stop moving, and 'blow up'. I have my animations, and all the fun stuff down- but my hit test isnt working one bit!

here is the code for the hit test- it runs in my main _root enterframe loop.

thanks.