Threaded comments reply link disappears after 3 levels

Hi,

I’m having trouble with threaded comments because the ‘reply’ link that normally appears under each comment disappears after I reach 3 levels down – I’ve set the ‘Enable threaded (nested) comments’ to 3 levels deep, but I’m assuming the reply link should always be there so people can continue commenting beyond three levels.

My code for comments.php and the callback function for wp_list_comments() (called myfunction_comment) are below. Is there anything I’m doing wrong?

myfunction_comment

function myfunction_comment($comment, $args, $depth) {
   $GLOBALS['comment'] = $comment; ?>
   <li <?php comment_class(); ?> id="li-comment-<?php comment_ID() ?>">
     <div id="comment-<?php comment_ID(); ?>">
      <div class="comment-author vcard">
         <?php echo get_avatar('', 50); ?>
         <div class="comment-profile">
             <span class="cauthor"><?php comment_author(); ?></span>
            <span class="cdate"><?php echo get_comment_date('d/m/y'); ?></span>
             <span class="ctime">At: <?php echo get_comment_time(); ?></span>
         </div>
      </div> <!-- End div.vcard -->
      <?php if ($comment->comment_approved == '0') : ?>
         <em><?php _e('Your comment is awaiting moderation.') ?></em>
         <br />
      <?php endif; ?>

      <div class="comment-text"><?php comment_text() ?></div>

      <div class="reply">
         <?php comment_reply_link(array_merge( $args, array('depth' => $depth, 'max_depth' => $args['max_depth']))) ?> <div class="comment-meta commentmetadata"><?php edit_comment_link('Edit ', ' | ') ?><?php delete_comment_link(get_comment_ID()); ?></div>
      </div>
     </div>
<?php
}

comments.php

<?php
/**
 * The template for displaying Comments.
 */
?>

            <div id="comments">
<?php if ( post_password_required() ) : ?>
                <p class="nopassword"><?php _e( 'This post is password protected. Enter the password to view any comments.', 'template_name' ); ?></p>
            </div><!-- #comments -->
<?php
        /* Stop the rest of comments.php from being processed,
         * but don't kill the script entirely -- we still have
         * to fully load the template.
         */
        return;
    endif;
?>

<?php
    // You can start editing here -- including this comment!
?>

<?php if ( have_comments() ) : ?>
            <h2 id="comments-title">Comments</h2>

<?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : // Are there comments to navigate through? ?>
            <div class="navigation">
                <div class="nav-previous"><?php previous_comments_link( __( '<span class="meta-nav">←</span> Older Comments', 'template_name' ) ); ?></div>
                <div class="nav-next"><?php next_comments_link( __( 'Newer Comments <span class="meta-nav">→</span>', 'template_name' ) ); ?></div>
            </div> <!-- .navigation -->
<?php endif; // check for comment navigation ?>

            <ol class="commentlist">
                <?php wp_list_comments('type=comment&callback=myfunction_comment'); ?>
            </ol>

<?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : // Are there comments to navigate through? ?>
            <div class="navigation">
                <div class="nav-previous"><?php previous_comments_link( __( '<span class="meta-nav">←</span> Older Comments', 'template_name' ) ); ?></div>
                <div class="nav-next"><?php next_comments_link( __( 'Newer Comments <span class="meta-nav">→</span>', 'template_name' ) ); ?></div>
            </div><!-- .navigation -->
<?php endif; // check for comment navigation ?>

<?php else : // or, if we don't have comments:

    /* If there are no comments and comments are closed,
     * let's leave a little note, shall we?
     */
    if ( ! comments_open() ) :
?>
    <?php
    // Don't include 'Comments are closed' on pages.
    if(is_page()) : ?>
        <p class="nocomments"><?php _e( '', 'template_name' ); ?></p>
    <?php else: ?>
        <p class="nocomments"><?php _e( 'Comments are closed.', 'template_name' ); ?></p>
    <?php endif; ?>

<?php endif; // end ! comments_open() ?>

<?php endif; // end have_comments() ?>

<?php
// Ridiculously complex and stupid way to format the comments form
$fields =  array(
    'author' => '<p class="comment-form-author">' . '<label for="author">' . __( 'Name' ) . '</label> ' . ( $req ? '<span class="required">*</span>' : '' ) .
                '<input id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) . '" size="30" /></p>',
    'email'  => '<p class="comment-form-email"><label for="email">' . __( 'Email' ) . '</label> ' . ( $req ? '<span class="required">*</span>' : '' ) .
                '<input id="email" name="email" type="text" value="' . esc_attr(  $commenter['comment_author_email'] ) . '" size="30" /></p>',
);

$defaults = array(
    'fields'               => apply_filters( 'comment_form_default_fields', $fields ),
    'comment_field'        => '<p class="comment-form-comment"><label for="comment">' . _x( 'Comment', 'noun' ) . '</label><textarea id="comment" name="comment" cols="45" rows="8"></textarea></p>',
    'must_log_in'          => '<p class="must-log-in">' .  sprintf( __( 'You must be <a href="%s">logged in</a> to post a comment.' ), wp_login_url( apply_filters( 'the_permalink', get_permalink( $post_id ) ) ) ) . '</p>',
    'logged_in_as'         => '<p class="logged-in-as">' . sprintf( __( 'Logged in as <a href="%1$s">%2$s</a>. <a href="%3$s" title="Log out of this account">Log out?</a>' ), admin_url( 'profile.php' ), $user_identity, wp_logout_url( apply_filters( 'the_permalink', get_permalink( $post_id ) ) ) ) . '</p>',
    'comment_notes_before' => '<p class="comment-notes">' . __( 'Your email address will <b>not</b> be published.' ) . ( $req ? $required_text : '' ) . '</p>',
    'comment_notes_after'  => '', // No tags allowed
    'id_form'              => 'commentform',
    'id_submit'            => 'submit',
    'title_reply'          => __( 'Leave a comment' ),
    'title_reply_to'       => __( 'Leave a comment for %s' ),
    'cancel_reply_link'    => __( 'Cancel reply' ),
    'label_submit'         => __( 'Post Comment' ),
);

comment_form($defaults); ?>

</div><!-- #comments -->