Quote Originally Posted by MikeAA
If I remove the wireless card Knoppix starts up fine.
Is your wireless card supported under the Linux 2.6 kernel? If so, then boot without the card in the PC slot. Once Knoppix is booted, insert the card and configure it using modprobe, iwconfig, ifconfig, etc.

That's a bit terse, so if you need more details, post back.

Regards,
- Robert
http://www.cwelug.org/