Comment Reply Link not working

So I’m finally taking a crack at really getting down and building my own theme, but I seem to have hit a wall.

I am working on my comments.php file and for the life of me cannot get a comment reply link to even appear. The site isn’t online so I’ll just post my code.

<?php if ($comments) : // there are comments ?>

<section id="comments">
	<h1><?php comments_number('0 Comments', 'One Comment', '% Comments' ); ?></h1>
	<?php $i = 1; ?>
	<?php foreach ($comments as $comment) : ?>

	<article <?php echo $oddcomment; ?>id="comment-<?php comment_ID(); ?>">
		<?php echo get_avatar( $comment, 100 ); ?>
		<header>
		<?php get_author_posts_url() ?>
			<h1><cite><?php comment_author_link(); ?></cite></h1>
			<a href="#comment-<?php comment_ID(); ?>" title="Permalink for this comment" class="comment-date"><?php comment_date('F jS, Y'); ?> at <?php comment_time(); ?> </a><?php edit_comment_link('Edit',' ',' '); ?>
			<?php if ($comment->comment_approved == '0') : ?>
				<p>Your comment is awaiting moderation.</p>
			<?php endif; ?>
		</header>
		<section>
			<?php comment_text(); ?>
			<div class="comment-reply">
				<?php comment_reply_link() ?>
			</div><!-- end div.comment-reply -->
		</section>
		<div class="commentnumber"><?php echo $i; ?></div>

	</article>
	<?php $i++; ?>
	<?php $oddcomment = (empty($oddcomment)) ? 'class="alt" ' : ''; // alternating comments ?>
	<?php endforeach; ?>

</section><!-- end section#comments -->

I have tried <?php comment_reply_link(); ?>, <?php get_comment_reply_link(); ?>, <?php comment_reply_link( array_merge( $args, array( 'depth' => $depth, 'max_depth' => $args['max_depth'] ) ) ); ?>. And none of these will output any bit of source code.

Can anyone enlighten me? I’ve become quite frustrated with this.

Thanks in advance!