[Samba] DDNS and DHCP problems

[Sam]

Hello all,

I have two new server samba4, with isc-dhcp and Bind. ( Thanks to Louis 
's scripts )
The AD was migrate from 2 Windows 2000 servers last friday, with a copy 
of them in a private lan.
Today we have shutdown the old windows 2000 server and put the 2 new 
samba4 in place of them.
The problem is that the DHCP does not update the DNS systematically...
That works with laptops ( which have not been connected to the lan last 
week ), but without reverse ptr too...

I can see some error in the syslog file :
Nov 16 17:19:39 S4 named[2269]: samba_dlz b9_format: unhandled record type 0
Nov 16 17:19:53 S4 named[2269]: samba_dlz: starting transaction on zone 
ariane.intra
Nov 16 17:19:53 S4 named[2269]: client 172.21.37.104#51400: update 
'ariane.intra/IN' denied
Nov 16 17:19:53 S4 named[2269]: samba_dlz: cancelling transaction on 
zone ariane.intra
Nov 16 17:19:53 S4 named[2269]: samba_dlz: starting transaction on zone 
ariane.intra
Nov 16 17:19:53 S4 named[2269]: samba_dlz: disallowing update of 
signer=l-s4gt963\$\@ARIANE.INTRA name=L-S4GT963.ariane.intra type=A 
error=insufficient access rights
Nov 16 17:19:53 S4 named[2269]: client 172.21.37.104#50486: updating 
zone 'ariane.intra/NONE': update failed: rejected by secure update (REFUSED)
Nov 16 17:19:53 S4 named[2269]: samba_dlz: cancelling transaction on 
zone ariane.intra

I identified these potential mistakes and try to resolve it without 
better results :
- I was trying to update dns in server1 from the server2 dhcp
- In smb.conf I set allow dns updates = secure ( and not nonsecure and 
secure like in the samba wiki )

Thanks for helping!
Best regards.

Sam