[Samba] domain authentication issue after rebooting Debian Jessie - need to restart samba each time

[gimili]

I followed the instructions here: 
https://wiki.samba.org/index.php/Setup_a_Samba_Active_Directory_Domain_Controller.'

Everything works find except when I reboot I have to restart samba or I 
added a pause and then restart to /etc/rc.local otherwise the windows 
machines can't authenticate.

I googled this problem but have not been able to figure out the solution.

My OS is debian Jessie.

Many thanks for any help/advice.

-- 
gimili