Pagination for wp_list_comments

For some background, I added a nav-item to the buddypress menu that shows that person’s most recent comments, but I can’t get pagination links to show up. I’ve gotten the comments to show and can even limit how many are on a page. My code:

global $bp;
$author_id = $bp->displayed_user->id;
$args = array(
	'user_id' => $author_id,
	'orderby' => $order_by,
	'order' => $order_dir,);
?>
			<div id="CommentListWrapper">
				<ol class="comment-list">
					<?php
// show individual comments	

wp_list_comments('callback=mytheme_comment&type=comment', get_comments($args)); ?>
</ol>

<div class="comms-navigation">
<div style="float:left"><?php previous_comments_link(); ?></div>
<div style="float:right"><?php next_comments_link(); ?></div>
</div>
			</div><!-- #COMMENT LIST WRAPPER -->

with mytheme_comment function:

[code moderated - the forum limit for posting direct is 10 lines; for anything more, please use the pastebin]

Things I've tried:

• enabled comment pagination in the Discussion admin options
• setting the per_page for wp_list_comments
• using paginate_comments_links( ) instead of using the individual next and previous functions

No matter what I do the pagination links will not appear. I can see different pages of comments by setting the "page" option in wp_list_comments, so I know they exist. The links for pagination just won't show. Any help would be greatly appreciated.