Hi,
I have tried to solve this problem more than 30 times creating new app on facebook and deleting old ones. I followed every step you mentioned in your installation guide. I face the same problem – Whenever I click on authorize, it asks me for my facebook ID and Password and when I login, it goes back into the admin page, it says “Add Link to Facebook needs authorization” and so on, round and round again.
I tried uninstalling the plugin but somehow, when I reinstall, it gets old app id and secret keys again. I also sent debug log to you few days back.
Sending it once again.