[rhn-users] RedHat ES 3.0 - kernel problem

[Geeknerd]

Running RH ES 3
I have an AIX server running DNS. When mapping an NT share drive on a PC 
using AIX as the DNS it works fine. When I change the PC to use the 
Linux server as DNS it reports "A Duplicate name exists on the network" 
The server share is \\lab2. lab2 resolves fine when pointing to the AIX 
server or Linux server. One caveat is lab2 is an alias for another server.
ie my DNS entry looks like this:
eco-center 9999999 IN A 192.168.1.85
lab2 9999999 IN CNAME eco-center
also tried
eco-center 9999999 IN A 192.168.1.85
lab2 9999999 IN A 192.168.1.85


Any suggestions what Linux might be doing that it would cause the PC not 
to see the shares on \\lab2?