[Samba] cannot login to swat as root

[Per olof Ljungmark]

Samba 3.0.22 configured as as BDC. Can login to swat as any user 
*except* root/Administrator.

What is even more puzzling is we have another machine with identical 
(well, almost it seems) configuration and no problem logging in as root.

Could someone please advise where I should look? There are no other 
symptoms other than this swat problem, browsing etc works just fine.

OS is FreeBSD 6.1 configured with ldapsam backend

Thanks!

[2006/07/04 00:01:47, 4, pid=15594, effective(0, 0), real(0, 0)] 
auth/pass_check.c:pass_check(621)
   pass_check: Checking (PAM) password for user root (l=10)
[2006/07/04 00:01:47, 4, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_start(459)
   smb_pam_start: PAM: Init user: root
[2006/07/04 00:01:47, 4, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_start(493)
   smb_pam_start: PAM: Init passed for user: root
[2006/07/04 00:01:47, 4, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_auth(510)
   smb_pam_auth: PAM: Authenticate User: root
[2006/07/04 00:01:47, 4, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_auth(532)
   smb_pam_auth: PAM: User root Authenticated OK
[2006/07/04 00:01:47, 4, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_account(551)
   smb_pam_account: PAM: Account Management for User: root
[2006/07/04 00:01:47, 2, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_account(561)
   smb_pam_account: PAM: There was an authentication error for user root
[2006/07/04 00:01:47, 2, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_error_handler(73)
   smb_pam_error_handler: PAM: Account Check Failed : authentication error
[2006/07/04 00:01:47, 0, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_passcheck(816)
   smb_pam_passcheck: PAM: smb_pam_account failed - Rejecting User root !
[2006/07/04 00:01:47, 4, pid=15594, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_end(440)
   smb_pam_end: PAM: PAM_END OK.
[2006/07/04 00:06:52, 0, pid=15659, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_passcheck(816)
   smb_pam_passcheck: PAM: smb_pam_account failed - Rejecting User root !
[2006/07/04 00:27:25, 0, pid=17123, effective(0, 0), real(0, 0)] 
auth/pampass.c:smb_pam_passcheck(816)
   smb_pam_passcheck: PAM: smb_pam_account failed - Rejecting User root !