If you're using JFBConnect v6.0.3, it's likely breaking due to changes that Facebook made about a week ago. Please upgrade to at least v6.1 which updates JFBConnect to be minimally compatible with the changes they implemented. We, of course, recommend upgrading all the way to 6.3, which has many other compatibility updates.
For more information, see our blog post:
www.sourcecoast.com/blog/the-facebook-pl...joomla-site-is-ready
We also sent out a newsletter reminding of the changes in mid-April. If you unsubscribed from our newsletter list, I'd recommend signing back up.
I hope that helps,
Alex