I tried putting a link of the facebook page in a URL button. It just goes to my personal facebook news feed. I also tried the Facebook Button. I put in the page link and then for app ID it looked like I had to create an app. So I did that and got a string of digits that I pasted in for ID box but same result.
Facebook URL is something like: https://www.facebook.com/yourpublishername Facebook ID is something like: 988194447833606