JFBConnect plugin isn't compatible with Gavick Events template

There isn't a fix we could provide for that problem. Whatever is inserting the Facebook Like buttons is using the very old Facebook Javascript library (//connect.facebook.net/nl_NL/all.js#xfbml=1) which Facebook has deprecated and not recommended using for over a year now. The new Javascript library, which JFBConnect properly uses, is not compatible and cannot be loaded at the same time as the old Facebook Javascript library.

If you want to use any Facebook functionality from JFBConnect, you'll need to disable the inclusion of that other library. You can still leave the buttons that the other extension is adding, but the Javascript must be removed.

I hope that helps explain,
Alex