Can't logon into domain Samba

[Holger Eilhard]

Hi there,

after a time and by the help of your (helpful!) FAQ I got my Samba PDC. But
my NT Workstation says that a connection to the Domain-Controller isn't
possible. In my log.nmb the following entries repeat while trying to connect
to the PDC:
send_backup_list_response: sending backup list for workgroup SAMBA to BART<00> IP 192.168.0.2
process_get_backup_list_request: request from BART<00> IP 192.168.0.2 to SAMBA<1b>.
process_get_backup_list_request: Cannot find workgroup SAMBA on subnet UNICAST_SUBNET.
process_logon_packet: Logon from 192.168.0.2: code = 7
process_logon_packet: GETDC request from BART at IP 192.168.0.2, reporting úÿ¿x—
                                                                                domain SAMBA ntversion=1 lm_nt=ffff lm_20=ffff

My smb.conf looks like the following:
[global]
; substitute your workgroup here
  workgroup = SAMBA

; a description of domain sids can be found elsewhere.
; you **MUST** begin the domain SID with S-1-5-21.
; the rest is up to you.
  domain sid = S-1-5-21-123-456-789-123

; tells workstations to use SAMBA as its Primary Domain Controller.
  domain logons = yes
  domain controller = yes
  domain master = yes

I also have an entry for my Workstation (bart$) in the smbpasswd file:
bart$:generated by smbpasswd:generated by smbpasswd:0080:anything_else:

What could be wrong?! I suppose it is something with the:
process_get_backup_list_request: Cannot find workgroup SAMBA on subnet UNICAST_SUBNET.
What does this mean? Is it normal?

Any ideas would be welcome...

Holger