[Samba] user passwords expired every domain-login from xp-workstation

[maddin911]

Hi,

I migrated from sles 10 sp2 samba 3.0.24 to ubuntu 9.10 server samba 3.4.3
(pdc).
The user-account were moved following this instruction: 
http://www.cyberciti.biz/faq/howto-move-migrate-user-accounts-old-to-new-server/
http://www.cyberciti.biz/faq/howto-move-migrate-user-accounts-old-to-new-server/
.
When user now login to the domain from a xp-workstation following message
appears at every login:

"Windows password expired and has to be changed.
You have to change your password now!"

The user can change the password and everything works fine. At next login
the same story. This happens only to some of the old users and to all users
created after migration.

Any idea what could be the reason for this? I already searched a lot but
didn't find something like this.

Regards,
maddin911

Here my  http://old.nabble.com/file/p27324591/smb.conf smb.conf 
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