hi
I ve tried to start again at the beginnig, with a copy of knoppix (cp -Rp /knoppix/* ..) without any change.
So the only thing i ve done is to : dpkg-reconfigure kdm, and choose kdm as default.
Then i remaster my knoppix.

Still a problem, after I log, kdm restart and ask me for the login.
In the kdm.log is the fellowing :

Auth name :MIT MAGIC COOKIE ID -1 ...
X :Client 2 rejected from local host

if anyone can tell me if he succeed in using kdm or gdm on a remaster cd.... and what he did.

Thanks