samba - Jan 2003 - Problem to access sambaserver from another subnet.

Hi,

I have a network that has a  NT4 PDC and 2 NT4 BDC plus one linux samba 
server.
Then there is a "VPN"subnet routed over ADSL to the main network.

The problem is that I can't connect to the samba sever from the VPN with 
either W98 or W2k

I can log on to the domain, can ping the servers, can see the server in 
the network neighbourhood.
But I can't login, it says that wrong password or user name. The samba 
server is in security domain mode and uses winbind to authenticate from the NT4
PDC. And it
works fine in the
local network.

The network doesn't have a WINS server set up, can that be the problem?
Can it be some kind of NT4 permission srewup?

Thanks
Mikko