Question : the list of servers for this workgroup is not currently available

I have a small workgroup network consisting entirely of wXP and w2k machines, 4 in total.  All have personal firewalls and there is also a Linksys firewall providing overall service and DHCP service.  I use Windows file and printer sharing and in the past all 4 machines have seen each other, shared files and used the printers.  Now one of the machines gets the message "the list of servers for this workgroup is not currently available" when I try to show the Network Neightborhood list of other machines.  However I can ping the other machines  

On the other machines you can see the errant machine in the browser list.

I do have the MS firewall turned off and I do have NetBIOS over TCP/IP turned on.  

What do I need to do to get this machine to be part of the workgroup again?  I've done all of the obvious stuff.

Thanks, Rich

Answer : the list of servers for this workgroup is not currently available

PAQed, with points refunded (500)

Lunchy
Friendly Neighbourhood Community Support Admin