How to use Instant Messenger in phpBB Social Network?

Hi,

I followed the steps to install the social network as shown in below link. I am able to install the social network in my forum. I can see online and offline users. Also, I set the permissions “allow chat only with friends” ," Open links in new window" in ACP. However I cannot chat with friends.

http://socialnetwork.phpbb3hacks.com/viewtopic.php?t=886&sid=f61609d4423acff41be2381fc04b6a6a

http://socialnetwork.phpbb3hacks.com/viewtopic.php?f=15&t=32&sid=3a6d22eddbf1079b62bd0d6b2fcc01e1

Would greatly appreciate your help.

Thanks.