Show comments on main index page

Hi,

I am trying to show comments underneath each post on the main index page of my blog.

Searching the forum shows that i should put <?php comments_template(); ?> in my code before <?php endwhile; ?>
.

I have tried doing this and it is not working. Any ideas?

My index code is below.

Thanks.

<?php get_header();?>
<?php get_sidebar();?>
<div id="content">
  <?php if (have_posts()) : ?>

		<?php while (have_posts()) : the_post(); ?>

			<div class="post" id="post-<?php the_ID(); ?>">
				<h1><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h1>

				<div class="entry">
					<?php the_content(); ?>
				</div>

				<div class="postmetadata"><?php the_tags('Tags: ', ', ', '<br />'); ?> Posted in <?php the_category(', ') ?> on <?php the_time('F j, Y') ?> <!-- | by <?php the_author() ?> -->| <?php edit_post_link('Edit', '', ' | '); ?>  There are currently <?php comments_popup_link('No Comments', '1 Comment', '% Comments'); ?></div>

			</div>

		<?php endwhile; ?>

		<div class="navigation">
			<div class="alignleft"><?php next_posts_link('&laquo; Older Entries') ?></div>
			<div class="alignright"><?php previous_posts_link('Newer Entries &raquo;') ?></div>
		</div>

	<?php else : ?>

		<h2 class="center">Not Found</h2>
		<p class="center">Sorry, but you are looking for something that isn't here.</p>
		<?php include (TEMPLATEPATH . "/searchform.php"); ?>

	<?php endif; ?>
</div>
<?php get_footer ();?>

</body>
</html>