Setting up Gravatar

On my last theme it worked and now it’s not working on this theme. I did it exactly the same way I thought. Anyway my site is http://fragilemusings.net and here is what I put on the comments php setup:

<?php if ($comments) : ?>
<h3 id=”comments”><?php comments_number(__(‘Comments’), __(‘1 Comment’), __(‘% Comments’));?></h3>

<ol id=”commentlist”>

<?php foreach ($comments as $comment) : ?>

<img src=”<?php gravatar() ?>” alt=”” />

<li id=”comment-<?php comment_ID() ?>”>
<h4 class=”commentauthor”><?php comment_author_link() ?> <?php _e(‘said,’); ?></h4>