Please make sure you have JomSocial's Facebook features disabled. You shouldn't have an API key or Secret key set in their configuration. That may help. If not, please send a URL to your page.
Additionally, in AceSEF, you should be able to turn off SEF URLs for JFBConnect. You should try doing that, as there are few URLs in JFBConnect that need to be search engine friendly.
I hope this helps, if not, let us know.