Problem with Knoppix live DVD

Hello. At the end of my first session with the Knoppix live DVD (v.5.0.1), I tried to save my Knoppix settings using the wizard provided. After a while I got a message saying that the settings had NOT been saved. Now, when I try to boot from the DVD, I get a message saying that the Knoppix file system cannot be found. I would be grateful for any advice on how to resolve this problem, please. Many thanks.

Wow, sounds like the old bad dvd trick. Take harry's advice and reburn at the slowest
possible speed.

Thanks for responding. Unfortunately I didn't burn the DVD, I bought it (from CheepLinux), so I guess I'd better take it up with them.