Movement and rotation in Flash 8

Hello everyone! I am trying to make an Asteroids spin-off based on the tutorial at this page
using more complex movieclips and I’m using Flash 8. My questions are:

When I apply the code shown there to an existing movieclip (doing the necessary changes for names and instances) it doesn’t work! I even tried just pasting the whole thing to a blank project and it will load the asteroids and draw everything, but the ship does not move nor does it fire. Now, I solved this problem saving it as a prior Flash version, but I’d like to know how can I do it with F8? The other thing is that when I turn the ship, it will turn as if the center was in the upper-left corner…How do I change this?

Thanks in advance!