Custom Theme: comments.php not loading

Hi,

I’m testing out a site here and for the life of me can’t figure out why the comment form isn’t loading on single pages.

Here’s my comments.php:

<?php
/**
 * The template for displaying Comments.
 *
 * The area of the page that contains both current comments
 * and the comment form. The actual display of comments is
 * handled by a callback to twentyten_comment which is
 * located in the functions.php file.
 *
 * @package WordPress
 * @subpackage Twenty_Ten
 * @since Twenty Ten 1.0
 */
?>

      <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.', 'twentyten' ); ?></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() ) : ?>
      <h3 id="comments-title"><?php
      printf( _n( 'One Response to %2$s', '%1$s Responses to %2$s', get_comments_number(), 'twentyten' ),
      number_format_i18n( get_comments_number() ), '<em>' . get_the_title() . '</em>' );
      ?></h3>

<?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">&larr;</span> Older Comments', 'twentyten' ) ); ?></div>
        <div class="nav-next"><?php next_comments_link( __( 'Newer Comments <span class="meta-nav">&rarr;</span>', 'twentyten' ) ); ?></div>
      </div> <!-- .navigation -->
<?php endif; // check for comment navigation ?>

      <ol class="commentlist">
        <?php
          /* Loop through and list the comments. Tell wp_list_comments()
           * to use twentyten_comment() to format the comments.
           * If you want to overload this in a child theme then you can
           * define twentyten_comment() and that will be used instead.
           * See twentyten_comment() in twentyten/functions.php for more.
           */
          wp_list_comments( array( 'callback' => 'twentyten_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">&larr;</span> Older Comments', 'twentyten' ) ); ?></div>
        <div class="nav-next"><?php next_comments_link( __( 'Newer Comments <span class="meta-nav">&rarr;</span>', 'twentyten' ) ); ?></div>
      </div><!-- .navigation -->
<?php endif; // check for comment navigation ?>

  <?php
  /* If there are no comments and comments are closed, let's leave a little note, shall we?
   * But we only want the note on posts and pages that had comments in the first place.
   */
  if ( ! comments_open() && get_comments_number() ) : ?>
    <p class="nocomments"><?php _e( 'Comments are closed.' , 'twentyten' ); ?></p>
  <?php endif;  ?>

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

<?php $comment_args = array( 'fields' => apply_filters( 'comment_form_default_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"' . $aria_req . ' />' .
                '</p><!-- #form-section-author .form-section -->',
    '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"' . $aria_req . ' />' .
    '</p><!-- #form-section-email .form-section -->',
    'url'    => '<p class="comment-form-url">' .
                '<label for="url">' . __( 'Website' ) . '</label> ' .
                '<input id="url" name="url" type="text" value="' . esc_attr(  $commenter['comment_author_url'] ) . '" size="30" />' .
    '</p><!-- #form-section-email .form-section -->','' ) ),
    'comment_field' => '<p class="comment-form-comment">' .
                '<label for="comment">' . __( '' ) . '</label>' .
                '<textarea id="comment" name="comment" cols="45" rows="8" aria-required="true"></textarea>' .
                '</p><!-- #form-section-comment .form-section -->',
    'comment_notes_after' => '',
    'label_submit' => __( 'Submit »' ),
);
comment_form($comment_args); ?>

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

And yes, on my page.php, I do have <?php comments_template(); ?>. Thanks in advance!