Problem mit meiner Sidebar

<div id="sidebar">
        <?php     /* Widgetized sidebar, if you have the plugin installed. */
            if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar() ) : ?>


        <?php if (is_front_page()) { ?>
        
        <div class="clearfix"></div>
        <?php } ?>
        
        <?php if (!is_page(array(246,'linksammlung','Linksammlung')) ) { ?>
        <h2>Neu in der Linksammlung</h2>
        
        <dl>
        <?php echo wpszene_linksammlung_sidebar(); ?>
        </dl>
        <?php } ?>
        
        <?php if (!is_404() && !is_front_page()) { ?>
        <h2>Werbung</h2>
    <?php wp125_write_ads(); ?>    
        <div class="clearfix"></div>
        
    <h2>Letzte Kommentare</h2>


<?php global $comment;
    if ( $comments = $wpdb->get_results("SELECT comment_author, comment_author_url, comment_ID, comment_post_ID, comment_content FROM $wpdb->comments WHERE comment_approved='1' ORDER BY comment_date_gmt DESC LIMIT 3") ) : ?>
        <dl>
        <?php foreach ($comments as $comment) {
        echo '<dt>' . sprintf('%s', get_comment_author_link(), '');
        echo '</dt>' . "\n"; 
        echo '<dd>' . '<span>&raquo;</span>' . sprintf('<a href="'. get_permalink($comment->comment_post_ID) . '#comment-' . $comment->comment_ID . '">' . $comment->comment_content . '</a>');
        echo '</dd>' . "\n\n";  
        } ?>
        </dl>


<?php endif; ?> 


        
        <?php } ?>
        
        <h2>Stichw&ouml;rter</h2>
        <div class="wp-cloud">
        <?php wp_tag_cloud('smallest=8&largest=18&number=80'); ?>
        </div>
        
        <?php global $user_ID; 
        get_currentuserinfo();


        if ($user_ID) { ?>
        <h2>Administration</h2>
        <ul>
        <?php wp_register(); ?>
        <li><?php wp_loginout(); ?></li>
        <?php wp_meta(); ?>
        </ul>
<br />
 <a href="http://validator.w3.org/check?uri=referer"><img
        src="http://www.w3.org/Icons/valid-xhtml10"
        alt="Valid XHTML 1.0 Transitional" border="0" height="31" width="88" /></a> <a href="http://jigsaw.w3.org/css-validator/check/referer">
        <img style="border:0;width:88px;height:31px"
            src="http://jigsaw.w3.org/css-validator/images/vcss"
            alt="CSS ist valide!" />
<br />
<a href="http://all-inkl.com/?partner=300103">
<img border="0" src="http://all-inkl.com/banner/button_hosted_by.gif" alt="ALL-INKL.COM - Webhosting Server Hosting Domain Provider" /></a>


        <?php } else { ?>
        <?php } ?>
        
        <?php
        endif; // End Widgets 
        ?>
    </div>

<div class="clearfix"></div>
        <?php } ?>
        
        <?php if (!is_page(array(246,'linksammlung','Linksammlung')) ) { ?>
        <h2>Neu in der Linksammlung</h2>
        
        <dl>
        <?php echo wpszene_linksammlung_sidebar(); ?>


        </dl>
        <?php } ?>