Question : NETBIOS over VPN

Hi Experts,
We have two LAN connected whit a VPN link,
192.168.80.0 255.255.255.0 1° Site
192.168.68.0 255.255.255.0 2° Site
in the 1° site there is a Windows 2003 SBS Server, Domain Controller, DNS, Wins Server, Exchange Server, Sharepoint Service, and 5 Windows XP client member of the domain.
in the 2° site there is 5 Windows Xp Client member of the 1° site domain, whit MSOutlook Exchange Client ready.
We can do a ping in both direction pinging name or IP Address anyway.
Wins server is configured on each machine
we wan to  use a My Network Places icon for browse and sharing resouces, but in the respective windows of the two site we can only see the local computer and not the other. and, for example if you use the "My Network Places" windows to reach the pc put \\ipaddress or \\computername  ...doesnt works.
the wins table on the server show the right registration for all the client
the tcp and vpn works correctly
in the firewall log I can see a reset tcp session on port 445 and 139 from and to the machine were a make the test, and I think that it meen the machine are tolking correctly whit the tcp protocol.

thank for any suggestion.

Answer : NETBIOS over VPN

Then it seems like there is something blocking MS Networking.  This sounds like a port issue.  Most likely a firewall issue.  Do you have Windows Firewall turned on for the Windows XP computers?  It's usually on by default.  What about 3rd party firewalls like Norton Internet Security or similar?  You may want to temporarily disable them to test.