Netware Client

I’m running a Novell 4.11 file server and recently bought a Thinkpad X20 with Win2K.
Iinstalled the Netware Client but I do not have access to the network resources. I created a local user with the same name and password as the Netware one, I have set the prefered server but I’m getting this message :

You cannot be athenticated on …. . The Network path was not found.

The PCMCIA (Token Ring) card looks good, ping is not working also.

Any Ideeas ?