File sharing issue

I've got a strange issue with file sharing on a domain between one or more XP Pro workstations.

SETUP

12 or so XP Pro computers joined to a domain controller
1 Domain Controller (Samba)

All computers can authenticate to the domain controller with no problem. Browse shares from the server, no problem.

However, I have a need to share a set of files from a specific XP Pro workstation. I have a share setup, named 3net on this workstation (ws007) and have the permissions on the share set to everyone (full control).

When I attempt to connect to this share from other workstations I get the following error:

I don't get this error when connecting to this share from a service pack 1 installation, just SP2.

If I drop the domain membership and just set the sharing workstation up on a workgroup with the same name of the domain, and enable simple file sharing, it accessible from all the workstations.

So, I'm looking for any help solving this one. I've googled and googled for it and haven't been able to resolve.

SIDE NOTE
On all of the SP2 workstations, the firewall is turned off but the settings are greyed out even for the administrator. I resolved this issue by deleting the "HKEY_LOCAL_MACHINE \ SOFTWARE \ Policies \ Microsoft \ WindowsFirewall" key and setting the key: "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Group Policy\History\NetworkName" to match the domain suffix set in the networking config.

So there seems to be some group policy issues that are interfering with things on these workstations so I'm wondering if there are GP keys that affect the file sharing as well?

(and yes the sharing issue was there before deleting the firewall related key)

Thanks for any help!

james

OK, After much fussing I managed to figure this one out.

It turns out it had to do with the SID and group mapping on the Samba server. Apparently the XP workstations were applying some sort of default "non-domain" group policy that prevented the file sharing because they couldn't determine what group the user was a member of. Of course there were no hints of this in the log files.

The solution was to delete the existing group mapping using the "net groupmap delete" function on the Samba server and then re-create them. Once this was done, the XP machines needed to be re-joined to the network and then all was well.