Steer clear "YouNet Company" plugin. They are often outdated and Informations and installation the info given is generally outdated and has major shortcomings. They lack information about how to set up the various requirements on facebook with the various plugins they deliver, and there can be little or no examples of how Steer clear "YouNet Company have set up there! Assuming att they may not even know how it's done. Still, this undertaking much to learn. I bought a total of five products of them, it's just Ultimate News that I use today because of YouNet's unwillingness to give their clients the total info on how to do things.
But here is another facebookplugin that works as it should and is free: Facebook Connect