[Plugin: Ultimate Facebook Comments Email Notify] Email don't send

i have insert this cose on single.php of my theme

<div id=”fb-root”></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = “//connect.facebook.net/it_IT/all.js#xfbml=1&appId=MY APP ID”;
fjs.parentNode.insertBefore(js, fjs);
}(document, ‘script’, ‘facebook-jssdk’));</script>
<div class=”fb-comments” data-href=”<?php the_permalink(); ?>” data-num-posts=”2″ data-width=”470″></div>

Installed the plugin, commented for test but nothing.. why?

http://wordpress.org/extend/plugins/ultimate-facebook-comments-email-notify/