Final Cut Pro crashing - help!

Hi all;

On my system whenever I install Final Cut Studio, I cannot launch the applications... when they launch, I get a pinwheel and then crash. I've tried installing just the apps with no 'extras' or content, and still no luck. With Final Cut, I get to the initial screen asking my my preferred codec and such, and no matter what I choose as soon as I hit 'ok' it shuts down.

My machine is a gigabyte board with 8gb ram, Q6600 cpu, and ATI 3870 card.

Any help would be VERY much appreciated.