samba - Feb 2008 - authenticating a linux samba client to a win2k domain

Hello crew,

I'm having troubles with authenticating a linux samba client to a  
win2k domain.  Without creating local users I want to be able to log  
on using a user and pass valid only in the windows domain.

Somehow I seem to be stuck on the last part:

/var/log/samba/log.winbindd
[2008/01/14 16:22:12, 0] lib/util_sid.c:string_to_sid(242)
   string_to_sid: Sid S-0-0 is not in a valid format.
[2008/01/14 16:22:12, 0] nsswitch/winbindd_util.c:trustdom_recv(268)
   Got invalid trustdom response

Which results in a bad authentication:

/var/log/pam.log
Jan 14 16:29:03 sandbox pam_winbind[2632]: pam_winbind:  
pam_sm_authenticate (flags: 0x0000)
Jan 14 16:29:07 sandbox pam_winbind[2632]: Verify user `testuser'
Jan 14 16:29:17 sandbox pam_winbind[2632]: request failed:  
NT_STATUS_IO_TIMEOUT, PAM error was System error (4), NT error was  
NT_STATUS_IO_TIMEOUT
Jan 14 16:29:17 sandbox pam_winbind[2632]: internal module error  
(retval = 4, user = `testuser')

When I login using a WRONG password:

/var/log/pam.log
Jan 14 16:31:33 sandbox pam_winbind[2675]: pam_winbind:  
pam_sm_authenticate (flags: 0x0000)
Jan 14 16:31:35 sandbox pam_winbind[2675]: Verify user `testuser'
Jan 14 16:31:35 sandbox pam_winbind[2675]: request failed: Wrong  
Password, PAM error was Authentication failure (7), NT error was  
NT_STATUS_WRONG_PASSWORD
Jan 14 16:31:35 sandbox pam_winbind[2675]: user `testuser' denied  
access (incorrect password or invalid membership)

When I login using `wronguser`:

/var/log/pam.log
Jan 14 17:38:43 sandbox pam_winbind[2928]: pam_winbind:  
pam_sm_authenticate (flags: 0x0000)
Jan 14 17:38:45 sandbox pam_winbind[2928]: Verify user `wronguser'
Jan 14 17:38:45 sandbox pam_winbind[2928]: request failed: No such  
user, PAM error was User not known to the underlying authentication  
module (10), NT error was NT_STATUS_NO_SUCH_USER
Jan 14 17:38:45 sandbox pam_winbind[2928]: user `wronguser' not found


I'm very willing to supply more info but I thought posting the entire  
config upfront is a little too much. I'm using Linux sandbox  
2.6.18-5-686 #1 SMP Mon Dec 24 16:41:07 UTC 2007 i686 GNU/Linux
and Samba Version 3.0.24

Cheers

Joost