VPN Connects But Can’t Access Shares

I have setup an NT4 Server with RAS & PPTP, SP5 connected to the Internet with DSL. I have a Win98 Client who can connect, login to the domain, and can see the server/computer list in Network Neighbourhood, and can ping computer in the domain usingUNC names, BUT I CAN NOT ACCESS the shares. I have tried mapping a drive letter, using the run command \\servername. At the DOS prompt all computer are listed with Net View, but when I issue NET VIEW \\SERVERNAME I get error 5: Do not have access.