"Called name not present" - Howto solve?

[alexander.skwar at delphiauto.com]

Hello!

I've  got a  problem  connecting  my Linux  Mandrake  8.0 box  running
samba-2.2.0-5mdk to a Windows server.

I've been given the IP-Adress, Sharename and username:
IP\Share: \\164.56.65.199\transfer
Username: John Doe
(Note:  It's not  really "John Doe", but another name, but also with a
blank.)

There's no password.