Apparently Rational Rose isn't compatible with Vista, thus the trouble you're having. You can try running it in Virtual PC with XP installed on it.. I'm assuming you have an XP disk.
I would suggest running it in compatibility mode but I'm not sure that stands true if you can't even install it in the first place.
I would suggest running it in compatibility mode but I'm not sure that stands true if you can't even install it in the first place.