Duplicate Name Detected

I am getting this event in event viewer whenever I restart my win2k server.

“A Duplicate name has been detected on the TCP network. The IP address of the machine that sent the message is in the data. Use nbtstat -n in a command window to see which name is in the Conflict state.”

When I use nbtstat -n command it gives the following :

Node IPaddress:[202.71.140.97] Scope ID:[]
NetBios Local Name Table
Name type Status
————————————————–
INet~Services <1C> GROUP Registered

As well I have checked all the machine for the same IP address as well the netbios name.
Still I am getting this error.

How can I resolve this problem???

Thanks
Deven