Seeing 'void(0)' when hovering over the button is normal. Our Javascript intercepts the click and performs the login differently than a normal link on your site is followed.
If it's not working, the issue is something else. To help solve, please let us know a site where we can see the problem (you can Private Message us if you don't want it to be public) and we'll gladly help investigate.
Also, please post from the account you subscribed to JFBConnect from. Priority support is for active subscribers only.
Thanks,
Alex
Facebook Login button not working
