Can't update reverse zone with samba4 + bind9

[Jorge Ariel Salomón Rodríguez]

Hi,

I have installed samba4 + Bin9 + dhcp working well, the problem is that 
it not update the reverse zone when a client is added to domain, this is 
the message that throws the log:

06-Jul-2015 21:40:58.267 samba_dlz: starting transaction on zone 
100.168.192.in-addr.arpa
06-Jul-2015 21:40:58.268 samba_dlz: spnego update failed
06-Jul-2015 21:40:58.268 client 192.168.100.1#20233/key rndc-key: 
updating zone '100.168.192.in-addr.arpa/NONE': update failed: rejected 
by secure update (REFUSED)
06-Jul-2015 21:40:58.269 samba_dlz: cancelling transaction on zone 
100.168.192.in-addr.arpa

What should I do to fix this problem and reverse zone is updated correctly?

Thanks.