Win 2000 and 95 Clients

I have a small network with a Win 2000 Server and mostly Win 2000 Workstations, but there are a couple of Win 95 Clients also. The problem is the Win 95 clients can see and access everyone including themselves but none of the 2000 machines includingthe server can access the Win 95 Clients.
All you get is this message –
//computername is not accessible
The account is not authorized to log in from this station. –

I can ping the 95 machines from any station by name or IP address.
Please help. I know this must be something simple but I can’t find it.
Thanks. TheTravman………………