Who's the developer of Ultimate Facebook? I need help!

Ultimate Facebook does not login or register new members. I haven’t been getting good support here so thought of asking if the developer can look into it. I have done all App settings correctly, cURL ok, deactivated all other plugins except buddypress, put my blog on default theme yet UFB doesn’t work. It just keeps coming back to the same page without logging in after popping up Facebook login / permissions screen.