Hm. Is this a recent installation? A while back there was a small issue with some default option values that weren't getting set properly -- this may have been one of them. You may need to reset the plugin settings to their defaults in order to fix this. You can add the following to your wp-config.php file, then disable and re-activate the plugin:
define('NGFB_RESET_ON_ACTIVATE', true);After re-activating, make sure you remove this line from your wp-config.php file. ;-)
js.