Thank you for this advice. I have try to reinstall knoppix (3.7). So I started Knoppix. I selected in the startmenu knoppix/utilities/install software and install the nvidia drivers. All worked fine. But after the installation of the nvdia drivers the command "knoppix-installer" doesn't work. i get following error message:

/usr/sbin/knoppix-installer: line 428: check_partition_ok: command not found
/usr/sbin/knoppix-installer: line 434: msgbox: command not found
/usr/sbin/knoppix-installer: line 435: menu_part: command not found

Before the installation it works. I also tried the knoppix-game edition and get the same error what i can do?

Fabian