ENDIAN Firewall - problem about Authen AD

i have problem about authen AD
i will use command in ssh command about
now my Domain is pmk.com and my netbios is factory i will have problem
i will use window authen
i will use this command cd /etc/samba
vi /etc/samba/winbind.conf
i will change workgroup to factory
i will can join to domain with net ads -u administator -s /etc/samba/winbind.conf
and i will start command winbind
it ok to join domain and user in
but when i create new policy
i wll save but i will can't select user again
i will to use comamand again it don't save config to samba
anyone can help
my problem is netbios not same domainname eg. my domain is pmk.com netbios or workgroup is factory
2. my problem i will join with command when save net policy config is changed not selecet user again