problems with samba as a PDC server

[Gustavo Rahal <listas@xxxxxxxxxx>]

Hi

I am trying to configure a samba to be a PDC server on a small home 
network. Never did it, completely newbie in this area.
Well, I read some documentation about how to do this but it's not 
working. From a winXP machine I can access the shares on the server. 
WinXP prompts for the user and password and connects correctly. When 
trying to configure XP as part of the domain I get an error: "The user 
name could not be found". When I try to log in with a nonexisting user I 
get a different message. When trying to connect with a normal user (not 
set as admin on smb.conf) I get a "Access is denied" message. So it 
seems like the users are been correctly identified by the server. I'm 
using fedora core 1 with samba 3.0.2rc1 (upgraded in hope that would 
work with the latest version)

Thanks
Gustavo

Here goes my smb.conf:

[global]
       display charset = UTF-8
       workgroup = LONDON
       netbios name = FEDORA
       log file = /var/log/samba/%m.log
       max log size = 50
       socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
       add machine script = /usr/sbin/useradd -g domainmac -c
       domain logons = Yes
       os level = 65
       preferred master = Yes
       domain master = Yes
       local master = yes
       security = user
       admin users = matheus rahal
       logon path = \\%N\profiles\%u
       logon drive = H:
       logon home = \\homeserver\%u\winprofile
                                                                                                                             

[netlogon]
   path = /usr/local/samba/lib/netlogon
   writable = no
   browsable = no
                                                                                                                             

[profiles]
   ; you might wish to use a different directory for your
   ; Windows NT/2000/XP roaming profiles
   path = /home/samba-ntprof
   browsable = no
   writable = yes
   create mask = 0600
   directory mask = 0700
                                                                                                                             

[homes]
       comment = Home Directories
       writeable = yes
       browseable = No
                                                                                                                             

[printers]
       comment = All Printers
       path = /var/spool/samba
       printable = Yes
       browseable = No
                                                                                                                             

[dados]
       comment = Dados
       path = /mnt/dados
       writeable = yes