[Dovecot] FreeBSD and MySQL error

[cdmon.com]

Greetings

I have been installed dovecot-0.99.10.6 in my FreeBSD 4.10 with 
WITH_MYSQL=1 , but when I try to configure it to use mysql.conf file:
auth_userdb = mysql /usr/local/etc/dovecot-mysql.conf
auth_passdb = mysql /usr/local/etc/dovecot-mysql.conf

the program gives me the next error:
dovecot: Jul 13 10:49:03 Info: Dovecot starting up
dovecot-auth: Jul 13 10:49:04 Fatal: Unknown userdb type 'mysql'
dovecot: Jul 13 10:49:04 Error: Auth process died too early - shutting down
dovecot: Jul 13 10:49:04 Error: child 13659 (auth) returned error 89

Somebody knows why? What I'm doing wrong? It's possible to use MySQL with 
dovecot in a FreeBSD?

Thanks a lot in advanced.

-- 
_____________________
http://www.cdmon.com
¿dominios a 9,95 euros?
¿servidores DNS públicos?
¿se han vuelto locos?