Comments error with plugin wordpress-thread-comment

Hello,

I have installed the plugin wordpress-thread-comment in mij wordpress on my Dutch website http://www.takethebox.com and I have this code for my comments.php

<?php // Do not delete these lines
	if ('comments.php' == basename($_SERVER['SCRIPT_FILENAME']))
		die ('Please do not load this page directly. Thanks!');

        if (!empty($post->post_password)) { // if there's a password
            if ($_COOKIE['wp-postpass_' . COOKIEHASH] != $post->post_password) {  // and it doesn't match the cookie
				?>

				<p class="nocomments">Dit bericht is beveiligd met een wachtwoord<p>

				<?php
				return;
            }
        }

		/* This variable is for alternating comment background */
		$oddcomment = 'alt';
?>

<a name="reageer"></a><div class="header"><?php comments_number(__('Geen reacties'), __('Er is tot nu toe 1 reactie'), __('Er zijn tot nu toe % reacties'), 'commentslink', __('Reageren gesloten')); ?> op "<?php the_title(); ?>"</div><br />

<!-- You can start editing here. -->

<?php if ($comments) : ?>

	<?php foreach ($comments as $comment) : ?>

		<?php if ($comment->comment_approved == '0') : ?> <em>Your comment is awaiting moderation.</em>

			<?php endif; ?>

<div class="headercommentss"> <li id="comment-<?php comment_ID(); ?>"> <div class="gravatar"><?php if(function_exists('get_avatar')) { echo get_avatar($comment, '30'); } ?></div></a>
<div class="commentsuser"><?php comment_author_link() ?></div> <div class="datumcomments"><?php comment_date('j F, Y') ?> om <?php comment_time() ?></div>
<div class="commentsreactie">
  <?php comment_text() ?>
</div>
  </div>

	<?php /* Changes every other comment to a different class */
		if ('alt' == $oddcomment) $oddcomment = '';
		else $oddcomment = 'alt';
	?>

	<?php endforeach; /* end for each comment */ ?>

	</ol>

 <?php else : // this is displayed if there are no comments so far ?>

  <?php if ('open' == $post->comment_status) : ?>
		<!-- If comments are open, but there are no comments. -->

	 <?php else : // comments are closed ?>
		<!-- If comments are closed. -->
		<p class="nocomments">Comments are closed.</p>

	<?php endif; ?>
<?php endif; ?>

<?php if ('closed' == $post->comment_status) : ?>
<a name="comments"></a><div class="header">Geef een reactie</div>

<br /><div class="code">
<b><img border="0" src="http://www.takethebox.com/wp-content/themes/ttb/uitroepteken.gif" align="left">&nbsp;Reacties op dit bericht zijn gesloten.</b>
</div>
<?php endif; ?>

<?php if ('open' == $post->comment_status) : ?>

<a name="comments"></a><div class="header">Geef een reactie</div>

<?php if ( get_option('comment_registration') && !$user_ID ) : ?>
You must be <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?redirect_to=<?php the_permalink(); ?>">logged in</a> to post a comment.</p>
<?php else : ?>

<form action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php" method="post" id="commentform">

<?php if ( $user_ID ) : ?>

Ingelogd als <a href="<?php echo get_option('siteurl'); ?>/wp-admin/profile.php"><?php echo $user_identity; ?></a>. <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?action=logout" title="Log out of this account">Uitloggen</a></p>

<?php else : ?>

<table border="0" width="100%" id="table1">
	<tr>
		<td><label for="author">Naam</label></td>
		<td><input type="text" name="author" id="author" value="<?php echo $comment_author; ?>" size="22" tabindex="1" /></td>
	</tr>
	<tr>
		<td><label for="email">E-mail</label></p></td>
		<td><input type="text" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="22" tabindex="2" /></td>
	</tr>
	<tr>
		<td><label for="url">Website</label></td>
		<td><input type="text" name="url" id="url" value="<?php echo $comment_author_url; ?>" size="22" tabindex="3" /></td>
	</tr>
</table>

<?php endif; ?>

<!--<p><small><strong>XHTML:</strong> You can use these tags: <?php echo allowed_tags(); ?></small></p>-->
<p></p><?php if ( function_exists(cs_print_smilies) ) {cs_print_smilies();} ?>
<br />

<textarea name="comment" id="comment" cols="60%" rows="6" tabindex="4"></textarea>

<p><input name="submit" type="submit" id="submit" tabindex="5" value="Reageer" />
<input type="hidden" name="comment_post_ID" value="<?php echo $id; ?>" />
</p>

</form><center>

<?php endif; // If registration required and not logged in ?>

<?php endif; // if you delete this the sky will fall on your head ?>
</center></center>

The plugin dousn’t works with this plugin, there comes a Javascript error in the statusbar in internet explorer.

Please help me!