You're saying the settings in the Social configuration area of JFBConnect aren't working? If so, please check the following:
* In the "Content Plugin - K2 Comments" tab, the "Show in K2 Userpage View:" is set to Top, Bottom, or Both (not None)
* The "Number of Comments" option for Item and Blog view are not 0
* Ensure that the JFBCContent plugin is enabled
If all of those are setup correctly, but the comment box still is not showing, just let us know, and we'll do some more testing and investigation to understand the problem more. Also, can you let us know if the Comment box shows up on normal K2 articles or blog layouts properly?
Thanks,
Alex