Hmm. Strange. Sorry, but I can't help you out anymore. ( Not that I did much in the first place).
I suggest emailing Larian technical suppourt. Tell them your problem and your specs.
Er, their email is. er,
suppourt@larian.com ? Not quite sure actually. <img src="/ubbthreads/images/graemlins/ouch.gif" alt="" /> Er, I don't think its that one BTW.