SAMBA findet keine Arbeitsgruppen

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[global]
workgroup = TUX-NET
interfaces = 192.168.44.8 127.0.0.1 eth0
bind interfaces only = true
printing = cups
printcap name = cups
printer admin = @ntadmin, root, administrator
map to guest = Bad User
security = user
encrypt passwords = yes
server string = Samba Server 9.1
add machine script = /usr/sbin/useradd -c Machine -d /var/lib/nobody -s /bin/false %m$
domain master = yes
domain logons = yes
local master = yes
preferred master = yes
ldap suffix = dc=example,dc=com
netbios name = SambaNET
passdb backend = smbpasswd
os level = 65

[homes]
comment = Home Directories
valid users = %S
browseable = no
read only = No
guest ok = no
printable = no
[users]
comment = All users
path = /home
writeable = Yes
inherit permissions = Yes
veto files = /aquota.user/groups/shares/
browseable = yes
guest ok = no
printable = no
[groups]
comment = All groups
path = /home/groups
writeable = Yes
inherit permissions = Yes
browseable = yes
guest ok = no
printable = no
[pdf]
comment = PDF creator
path = /var/tmp
printable = yes
print command = /usr/bin/smbprngenpdf -J '%J' -c %c -s %s -u '%u' -z %z
create mask = 0600
browseable = yes
guest ok = no
[printers]
comment = All Printers
path = /var/tmp
printable = yes
create mask = 0600
browseable = no
guest ok = no
[print$]
comment = Printer Drivers
path = /var/lib/samba/drivers
write list = @ntadmin root
force group = ntadmin
create mask = 0664
directory mask = 0775
browseable = yes
guest ok = no
printable = no