[Samba] 3.0.23d : Failed to verify incoming ticket!

[sharif islam]

I have samba-3.0.23d with krb -1.3.4 connecting to a 2003 AD Server.
While connection from a windows client, it won't accept the correct
username and password. This is from
log.machinename:
[2007/01/04 14:43:26, 1] smbd/sesssetup.c:reply_spnego_kerberos(202)
  Failed to verify incoming ticket!
[2007/01/04 14:43:26, 1] smbd/sesssetup.c:reply_spnego_kerberos(202)
  Failed to verify incoming ticket!
[2007/01/04 14:43:26, 1] smbd/sesssetup.c:reply_spnego_kerberos(202)
  Failed to verify incoming ticket!
[2007/01/04 14:43:26, 1] smbd/sesssetup.c:reply_spnego_kerberos(202)
  Failed to verify incoming ticket!
[2007/01/04 14:47:34, 1] smbd/sesssetup.c:reply_spnego_kerberos(310)
  Username DOMAIN\username is invalid on this syste


kinit works fine.
[root at samba]# kinit -V
Password for username at DOMAIN
Authenticated to Kerberos v5

log.winbindd
[2007/01/04 14:43:31, 1] nsswitch/winbindd_user.c:winbindd_getpwnam(161)
  user 'username' does not exist
any idea?