I've created a knoppix live cd, version 5.0.1, and i'm trying to boot it on my laptop but i keep getting the error:

"Can't find KNOPPIX filesystem. sorry.
Dropping you to a (very limited) shell.
Press reet button to quit.

Additional builtin commands availible:
cat mount umount insmod rmmof lsmod

knoppix_"

I've tried creating a 2nd disc, i've downloaded an older version and tried that, twice, using different software to create the disc and burning and 4x or 8x speed. I've tried numerous commands including nodma, failsafe plus all four "tips and tricks" commands on the wiki/cheat_codes page on this site.

anyone got any new ideas?