I just got a new motheboard and had to do a reinstall of Knoppix. The version that I am using is 3.7. When I then issue "apt-get update', I get many messages of the ilk:

Err http://ftp.de.debian.org unstable/non-US/non-free Packages
404 Not Found
Ign http://ftp.de.debian.org unstable/non-US/non-free Release

In fact, I get this sort of message for the unstable/non-US entries and testing/non-US. Also this happens for several mirrors nand not just ftp.de.debian.org.

I have been trying for about 24 hours. The seems to leave me unable to update or install anything. Can you tell me what I am doing wrong.

Thanks in Advance