Can not IP address to blacklist

==== Required information ====
- iRedMail version: 0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: CentOS 6.5 64bit
- Related log if you're reporting an issue:
- iRedAdmin-pro 1.8.2
====

Dear support,

I add IP address to blacklist, the message is: Records were successfully added.
However when reviewing the Blacklsits I can not find any any record in both All blaclists and IP Address pannel.

I can add domain to blacklists. However, there is no affect, spam still come and smtp connection still be ESTABLISHED.

Spam only stopped when I add the IP to Iptables.

Thanks and best regards,
Minh