samba - Mar 2002 - suddenly its not possible to load server-based profile when loggin on

Hi folks,
I'm running Samba 2.2.2 as a PDC for W2k-clients. Everything used to work
just fine, but since yesterday the server-based profile couldn't be read at
logon. Cleints tells "Access denied". The logfile tells:

[2002/03/24 16:29:24, 0] rpc_server/srv_netlog.c:api_net_sam_logon(208)
  api_net_sam_logon: Failed to marshall NET_R_SAM_LOGON.
[2002/03/24 16:29:24, 0] rpc_server/srv_pipe.c:api_rpcTNP(1204)
  api_rpcTNP: api_netlog_rpc: NET_SAMLOGON failed.

Can someone please help me ?
I have no idea whats going wrong, because absolutely nothing has beend
changed at the PDC for 3 weeks now, and it suddenly stopped working prperly
wihtout any reason.
What do I have to do to get it working again ?

thx

Stephan

>I'm running Samba 2.2.2 as a PDC for W2k-clients. Everything used to
work
>just fine, but since yesterday the server-based profile couldn't be read
at
>logon. Cleints tells "Access denied". The logfile tells: ...
First: delete the locally cached user profiles on the clients (xx:\documents and
settings\...)
Attention: copy them to a save place fist - some user data may be stored
in this area which is not part of the roaming profile (have seen it sometimes
with
MS Outlook).

It may also be caused by a 'lost' PDC-SID. Locate the file MACHINE.SID
on the server
(maybe in /usr/locale/samba/private), make a copy to a safe place and
replace it with the one from you older backup - check if the files are identical
- if not,
this should be the reason for your problem, keep the older file and try to
logon.

Setting nt acl support = false in the profile-share configuration may help too.

Good luck,
Martin