samba - Aug 2005 - Error: Duplicate name exist on the network

This is error that im getting:

""""Error: You were not connected because a duplicate name
exist on the
network. Go to system in Control Panel and change the computer name and  
try again.""""

The thing is that only one computer is on the network and I already  
changed the name several times and restarted the PC.
Can anybody help me to solve this problem???
My smb.conf and hosts files can be seen on  
http://forums.fedoraforum.org/showthread.php?p=341288#post341288


Thanks in advance,

greg