Do you have JomSocial installed, and if so, what version? JFBConnect won't show the profile sections for components that you don't have installed (or we can't detect for some reason).
If you're seeing nothing there and the Social Profiles - JomSocial plugin is enabled, it means there is some issue detecting or using that plugin that we'd have to investigate further.
Let me know the JomSocial version and we can go from there.
Thanks,
Alex