Those cheatcodes didn't work. Tha Knoppix I've been using is 3.4 release date 17-05-2004.
I tried downloading version 3.4 release date 10-05-2004 and this version works on my computer with no problem

Now I have another problem: I don't know how to configure the connection to the inernet with Knoppix.
I use broadband cable with a Thompson cable modem that can be connected to the computer by USB or by Ethernet card. Wich one is better or is easier to configure? and how could I do that???

Thank you very much for all your help!!!