I just found a mistake in the tpl_footer_menu.php. Please replace the includes/templates/andover_modern/common/tpl_footer_menu.php with this:

Code:
<?php
/* Page Template - tpl_footer_menu.php
*Display the Footer Menu
 * @package templateSystem
 * @copyright Copyright 2003-2006 Zen Cart Development Team
 * @copyright Portions Copyright 2003 osCommerce
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version $Id: tpl_footer_menu.php 1.0 5/9/2009 Clyde Jones $
*/
?>

<dl>
<?php echo QUICKLINKS; ?>
<?php echo INFORMATION; ?>
<?php echo CUSTOMER_SERVICE; ?>
<?php if (EZPAGES_STATUS_FOOTER == '1' or (EZPAGES_STATUS_FOOTER == '2' and (strstr(EXCLUDE_ADMIN_IP_FOR_MAINTENANCE, $_SERVER['REMOTE_ADDR'])))) { ?>
<?php echo IMPORTANT; ?>
<?php require($template->get_template_dir('tpl_ezpages_footer_menu.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_ezpages_footer_menu.php'); ?>
<?php echo IMPORTANT_END; ?>
<?php } ?>

</dl>

<span id="social-media">
<a href="<?php echo TWITTER; ?>"><img src="includes/templates/andover_modern/images/twitter.png" class="twitter-image"  alt="twitter link" /></a>
<a href="<?php echo FACEBOOK; ?>"><img src="includes/templates/andover_modern/images/facebook.png" class="facebook-image"  alt="facebook link" /></a>
</span>

<br class="clearBoth" />