Error for bind-dlz

[bindml]

Hello,

We've just set a testing plateform in order to use bind-dlz.
So we had install a  bind9-dlz on a FreeBSD 6.1.

All run OK since we activate the dlz option in the named.conf.
the error is : /etc/namedb/named.conf:68: unknown option 'dlz'

The 'named -v' answer :  BIND 9.3.2
the 'which named' answer  :/usr/sbin/named

'ls -la /var/db/pkg' answer : 
...
drwxr-xr-x  2 root  wheel  512 Aug  1 12:41 bind9-dlz+mysql-9.3.1+0.7.0
...
drwxr-xr-x  2 root  wheel  512 Aug  1 11:31 libtool-1.5.22_2
drwxr-xr-x  2 root  wheel  512 Aug  1 12:41 mysql-client-4.1.18_1
...


I would also like to know : 
- if some modification need to be made in the file :
   /usr/ports/dns/bind9-dlz/files/configure.bind9-dlz 

- if the dlz patch has been install 

Thanks in advance for your help.

Regards.
Henley SARAMANDIF
Telecom Italia