I am connected to a network via PPTP VPN and I cannot access the file server by name. I can however ping the name and it resolves just fine. I am trying to access \\servername but I get the error "The user name could not be found". I can access the share by IP address. My computer is not a member of the same domain, but I thought I should be able to enter my username and password when prompted but I am not even getting that prompt.