I feel as if there's something very basic I'm missing, but when I go through the process of adding an identity provider (=facebook) it doesn't seem to carry over to my site. I log into my Janrain account, give it permission to access data, etc., and then go back to my site's Janrain Engage GUI and save, as it instructs. But the FB icon isn't appearing there afterwards, nor on user login forms. Any thoughts?