Need users to auto login after Jomsocial registration

Mel,
JFBConnect has an automatic registration setting which will automatically create the users within JomSocial and log them in once done. Please make sure you have "Enable Automatic Registration" set to 'Yes' and it should do what you're looking for.

I hope that helps, but if not, let us know more about what you're doing, how you have things configured or any other details you can and we'll gladly help however we can.

Thanks,
Alex