[Samba] Cannot access shares on domain member server

[medusaXX]

Hello,

I have a Samba 3.0.23 server being a domain member server (security = ads).
I was able to join the domain without problems, but I cannot access shares
on the server using domain accounts. A log level = 10 log shows the
following errors:

[2006/10/20 18:24:15, 10] passdb/secrets.c:secrets_named_mutex(778)
  secrets_named_mutex: got mutex for replay cache mutex [2006/10/20
18:24:15, 10] libads/kerberos_verify.c:ads_secrets_verify_ticket(261)
  ads_secrets_verify_ticket: enc type [1] failed to decrypt with error Bad
encryption type [2006/10/20 18:24:15, 10]
libads/kerberos_verify.c:ads_secrets_verify_ticket(261)
  ads_secrets_verify_ticket: enc type [3] failed to decrypt with error Bad
encryption type [2006/10/20 18:24:16, 10]
libads/kerberos_verify.c:ads_secrets_verify_ticket(252)
  ads_secrets_verify_ticket: enc type [23] decrypted message !
[2006/10/20 18:24:16, 10] passdb/secrets.c:secrets_named_mutex_release(790)
  secrets_named_mutex: released mutex for replay cache mutex [2006/10/20
18:24:16, 10] libsmb/clikrb5.c:get_krb5_smb_session_key(685)
  Got KRB5 session key of length 16


The domain controller is a Windows 2003 server, the client trying to connect
a Windows XP SP2 machine.

Regards,
Christoph Kling