[Samba] logon

[PJourdan]

I cannot logon to samba server from Win2k. I can see the server on My 
Network Places, but the logon does not accept any of my know usernames or 
passwords.
I'm afraid I do not understand what has to be done to make it all work.
Strange thing is, on an earlier installation on another FreeBSD box it all 
works but I am totally unable to make it work on FBSD 4.6.2 2with samba 
2.2.6.pre2.
What am I doing wrong or what is it that I should understand to make it work?
Thanks for any help
Phil