Nope.
Let me see if I can help explain a little and maybe that will clear things up.
I assume this is what you have done:
- Install Joomla!. This is a CMS and allows you to have users and articles, menus and all sorts of good stuff.
- Using the Joomla! installer, install Community Builder. This is a Joomla component that allows you to have more community features like user profiles, messaging, etc. This does not include a forum by default, but does include ways to link to a forum you may have installed. I don't have much experience with this, so I would have to look at the CB documentation to see which forum they suggest using. Since you are trying to use Kunena, I assume this is what they are suggesting.
- Using the Joomla! installer, install Kunena (or whatever forum CB suggests). Once this is installed, it ties into the Joomla! user/authentication system, so users that log into your site can post on here and will also get CB profiles and other features on your site.
Is this where you are now? If so, is the issue that you still just get that message that forums are not installed? If so, I'm wondering if CB does not integrate with Kunena. I can look more at the CB code and see if I can figure out exactly what it's trying to do.
Let me know if I missed any steps you went through that might help me understand what you are trying to do and what's going wrong.
Hope this helps. Sorry about no messenger.