[Samba] Samba server doesn't announce itself.

[samba at theernsts.org]

Hi

I'm running two Samba Servers on the same network.
One if the servers announces itself correctly, and I can see it 
as a member of the "AtHome" workgroup from a Windows Box.
I set up a second server on the same network, but that
box does not appear to announce itself. If I added the
second server to the PC's hosts file, I can access it 
by entering \\ServerName in explorer. However, it does 
not show up when I browse the Windows Networks.

What settings control how and when a server announces it's name?

How can I best diagnose the problem?

Thanks!
Robert Ernst