I've told you once and I'll tell you again kev, LAY OFF THE PRAWN. j/k
Seriously though, I've heard tons of incompatability problems with Vista, so I'm guessing this is just one of those situations. Sorry I can't help you because I don't know a whole lot about the ins and outs of computers, but I'm sure someone will be able to help you *cough* Cabe *cough*.