Have you logged into your website using Facebook? You can check which users have logged in using Facebook by going to the JFBConnect -> Usermap area.
If you haven't logged in to your site with Facebook yet, you'll need to do that first. To setup authentication, if you haven't already, use these steps:
* Follow our
Facebook Application Setup guide
* Enable the SCLogin module
* Use the Facebook login button
* Approve the requested permissions and login
After that, your user should be in the usermap area and should show in the Channels page as well.
Thanks,
Alex