Authentication errors – Password server – Open Directory

The server was running fine for about 4month. Installed services are AFP, Samba and WebDAV. We are not serving a site, nor have we set up BIND and DNS services.

We have 10 or so Mac accounts and 3 Windows share points. I tested the Mac share points with OS 9 and Mac OS X and the Win share points with W2k and Win XP, everything was working fine.

Since about 2 weeks ago Windows users are not allowed to log in anymore, so are all WebDAV accounts, it is an authentication issue.

Yesterday we had to reboot the server, all of the sudden the main administrator can not log in anymore. Root login works fine so do most other user accounts.

I would like to know:

A. Any other ideas besides the Password server what could cause this?
B. How can I reset the password server and/or what should be the proper steps to ensure a proper functioning.
C. Any other solutions?

I appreciate any help, because on Friday I’ll erase the partition and start from scratch if I can’t figure it out!!

Thanks,
Boris