Wp_list_comments : invisible

Hi everyone,

I did my own theme, that you can see online here: https://www.regardsdumonde.fr.

I have a problem with the function wp_list_comments
When I go to my article (example here)
I can see the_content() and the_title() but when I try to see the comment it doesn’t work. I want to know why ??

This is the code of my page:

<?php $my_query = new WP_Query('p='.$article_num); ?>
<?php while ($my_query->have_posts()) : $my_query->the_post(); ?>
<article class="category-<?php echo $rub; ?>">
  <div class="contenu">
      <h2><?php the_title(); ?></h2>
      <?php the_content(); ?>
  </div>
</article>
<?php if ( comments_open() ) : ?>
    <article class="article medium" id="commentaires">
        <div class="contenu">
		<h3><?php printf( _nx( '1 commentaire', '%1$s commentaires', get_comments_number(), 'comments title', 'twentythirteen' ),number_format_i18n( get_comments_number() ) ); ?>
        </h3>

<ol class="comment-list">
<?php //wp_list_comments('type=comment&callback=mytheme_comment'); ?>
<?php //mytheme_comment('type=comment'); ?>
<?php //comments_template(); ?>
<?php wp_list_comments(); ?>
<?php //wp_list_comments('callback=mytheme_comment'); ?>
</ol>
    	</div>
	</article>
	<?php endif; // end have_comments() ?>

    <?php endwhile; ?>

I tried all this lines, one by one, but it doesn’t show anything.