CW2000 requires name resolution to work properly. The issues you are
seeing could be caused by failing name resolution.
A working DNS server in the network is strongly recommended. As an alternative you could use the Windows host file. WINS
is not a supported name resolution schema.
The following also must work properly:
nslookup [IP] (where [IP] is the IP address of the server)
nslookup [HOSTNAME] (where [HOSTNAME] is the name of the server)
nslookup [FQDM] (where [FQDN] is the fully qualified domain name
of the server.)