Client 4.91 (preferred network protocol= IP )

I have a server with TCP/IP and IPX. I added a new server configured with IP
only. 3 of 4 devices can see the new server but the 4th on can't. I have
deleted the Novell client and re-installed without any success. I notice
that in NWAdmin32 that this particular account has a Network address of:
"IPX ......", where the others have TCP/IP "server's IP address". I can't
remove it or change it.

How do I change the Network Address for this user?