Kommentieren funktioniert auf pages nicht

<?php get_header(); ?>
    <div id="content">
        <?php if (have_posts()) : ?>
        <?php while (have_posts()) : the_post(); ?>
            <div class="post">
                <p class="post-info"><?php the_author();?> on <?php the_time('d M Y'); ?></p>
                <h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link: <?php the_title(); ?>"><?php the_title(); ?></a>
                
                <!--<?php edit_post_link('(edit this)'); ?>--></h2>
                <div class="post-content">
                    <?php the_content('Continue Reading »'); ?>
                    <?php $sub_pages = wp_list_pages( 'sort_column=menu_order&depth=1&title_li=&echo=0&child_of=' . $id );?>
                    <?php if ($sub_pages <> "" ){?>
                    <p class="post-title">
                        <em></em>&nbsp;
                    </p>
                    <ul>
                        <?php echo $sub_pages; ?>
                    </ul>
                    <?php }?>
                    <?php wp_link_pages(); ?>
                    <!--
                        <?php trackback_rdf(); ?>
                    -->
                </div>
                <p class="post-footer">
                <?php comments_popup_link('kommentieren »', '1 Kommentar »', '% Kommentare »','','Kommentare geschlossen'); ?></p>                
            </div>
        <?php endwhile; ?>


        <div class="navigation">
            <div class="alignleft">
                <?php previous_posts_link('&laquo; Newer Posts') ?>
            </div>
            <div class="alignright">
                <?php next_posts_link('Older Posts &raquo;') ?>
            </div>
        </div>
        <?php else : include_once(TEMPLATEPATH. '/notfound.php'); endif; ?>


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