I've run into a similar problem and there are a few ways "troubleshoot" this scenario. But first:
What OS?What version of VW?What's your hardware setup?What media is the file on? (cd, zip etc.)If it's on a CD, who's the manufacturer?
I'm based in Vancouver, If you're in the area and you still need help, feel free contact me at mnelson@infotectus.net
Mike