connect to pserver from NT

[Largent, Jim]

I have several NT workstations using cvs and connecting to a repository on a
Unix box.  3 out of 4 work just fine, but the 4th can't login.  When I
enter:
cvs -d :pserver:address@hidden:/repository login

I get "unknown host", which is even more strange since I didn't specify the
hostname, I specified the IP address.  If it didn't on any machine, I'd at
least have a place to start looking.  Is there some configuration on the NT
box that needs to be tweaked?
Any suggestions are welcome.