User Groups

Hi,
I'm trying to setup samba samba-3.5.7

Samba setup is complete and I can get a Windows XP workstation to Join the domain.
I can log into the domain just fine and save my setting/access network shares

However there is one problem. I can't seems to find any User groups when I try to add them to administrator gorup on Windows. such as Domain Admins and Domain Users. When I search from a Windows workstation I can see all my users but not any of the groups. (I was doing it though Control Panal->Administrative tools->Computer Management)

"net gourpmap list" command outputs
Domain Users (S-1-5-21-1854383732-3336695604-2619946959-513) -> domusers
Domain Admins (S-1-5-21-1854383732-3336695604-2619946959-512) -> domadmins
Domain Users (S-1-5-21-1854383732-3336695604-2619946959-514) -> domguests

Winbind is also running.

Any help would be greatly appreciated...

My smb.conf file
------------------------

[global]
workgroup = EBT2
netbios name = filestore2
passdb backend = tdbsam
add user script = /usr/sbin/useradd -m %u
delete user script = /usr/sbin/userdel -r %u
add group script = /usr/sbin/groupadd %g
delete group script = /usr/sbin/groupdel %g
add user to group script = /usr/sbin/groupmod -A %u %g
delete user from group script = /usr/sbin/groupmod -R %u %g
add machine script = /usr/sbin/useradd -s /bin/false -d /var/lib/nobody %u
# Note: The following specifies the default logon script.
# Per user logon scripts can be specified in the user account using pdbedit
logon script = scripts\%U.bat
# This sets the default profile path. Set per user paths with pdbedit
logon path = \\%L\Profiles\%U
logon drive = H:
logon home = \\%L\%U
domain logons = Yes
os level = 35
preferred master = Yes
domain master = Yes
idmap uid = 15000-20000
idmap gid = 15000-20000
ldap ssl = No

[homes]
comment = Home Directories
valid users = %S
read only = No
browseable = No
hide files = /desktop.ini/ntuser.ini/NTUSER.*/

[It]
comment = IT Drive
path = /var/local/IT/
valid users = @it, Administrator
admin users = @it, Administrator
force create mode = 770
writeable = yes

[Accounts]
comment = Accounts Department Share
path = /var/local/samba/Accounts
valid users = @accounts, @it
admin users = @accounts, @it
create mask = 770
force create mode = 770
directory mask = 770
writeable = yes

[Groups]
comment = G Drive
path = /var/local/samba/Groups/
admin users = @it
create mask = 777
force create mode = 777
directory mask = 777
force directory mode = 777
guest ok = Yes
writeable = yes

[Newgroups]
comment = K Drive
path = /var/local/samba/Newgroups/
admin users = @it
create mask = 777
force create mode = 777
directory mask = 777
force directory mode = 777
guest ok = Yes
writeable = yes

[netlogon]
comment = Network Logon Service
path = /usr/local/samba/netlogon
admin users = root, administrator
guest ok = Yes
browseable = No

[Profiles]
comment = Roaming Profile Share
path = /usr/local/samba/profiles
read only = No
profile acls = Yes