Facebook comments not working

I cannot get facebook comments to work on my site.

This code used to work before I used this plugin.

function fb_comments() {
if (!is_page()) { ?>
<div class="fb_comments">
<div id="fb-root"></div><script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script> <fb:comments href="<?php the_permalink();?>" numposts="10" width="630" publish_feed="true"></fb:comments>
</div>
<?php }
}

remove_action('thesis_hook_after_post', 'thesis_comments_link');
add_action('thesis_hook_after_post', 'fb_comments');

I would think I could replace this with something like this

remove_action('thesis_hook_after_post', 'thesis_comments_link');
add_action('thesis_hook_after_post', 'my_action_name');

And name it as my_action_name in the plugin. Why doesn't it work?

I'm using Thesis 1.8.5