Hi,
I have exactly the same problem. Running from a Toshiba Portege 3110CT, tried to boot the Knoppix 3.3 beta 22-9-2003.

IT does start from the cd-rom (pressing c at the start), but after loading linuz etc. , it tells "Can't find KNOPPIX filesystem, sorry" and you are stuck in aminishell that is useless (you cannot even reboot to try another combination of cheatcodes).

Tried many many combinations with no luck.
Can anyone help?