facebook like button not working

Hello, developer of this excellent plugin for wordpress

I’ve been using your plugin but wing version 2.7 update

Because I had the version 2.52

There is no longer the facebook like button

this is my configuration
http://i.imgur.com/ZeDgi9R.png

and this website http://www.colombiaflow.com/web/
twitter button is the only one that appears

thanks

http://wordpress.org/extend/plugins/really-simple-facebook-twitter-share-buttons/