samba - Jun 2006 - Problem with group mapping and group management

Hi all,

I have 2 PCs, one is running Debian 3.1 and one is running Windows XP
Pro XP2. I'd like to setup my Debian PC to be a Samba server to share
file.
The problem is that: From Windows XP, using Computer Management
Console, I can view shares and UserList but I cannot view group list.

# ======================================[global]
server string = %h server (Samba %v)
security = users
encrypt passwords = yes
log level = 3
admin users = Administrator phuna

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/usermod -G '%g' '%u'
add machine script = /usr/sbin/useradd -d /var/lib/nobody -g 100 -s
/bin/false -M %u

[dave]
path = /home/dave
comment = Dave's home directory
# writeable = yes
# guest ok = true
# force user = dave
valid users = dave smb1
write list = dave smb1

[smb1]
path = /home/smb1
comment = Dave's home directory
# writeable = yes
# guest ok = true
# valid users = smb1

[share]
path=/home/share
comment = share directory

# ======================================
I'm very new to Samba, any help would be appreciated.

Thanks in advance

-- 
  Phu