I am trying to figure out how to add this bit of code suggested for the wishlist mod:

<a href="<?php echo zen_href_link(UN_FILENAME_WISHLIST, '', 'SSL'); ?>"><?php echo UN_HEADER_TITLE_WISHLIST; ?></a>
To this bit of code:

<?php echo "<a href=\"\">" . zen_image(DIR_WS_TEMPLATE_IMAGES . 'registry.jpg', 'Registry') . "</a>" . "<a href=\"\">" . zen_image(DIR_WS_TEMPLATE_IMAGES . 'wishlist.jpg', 'Wishlist') . "</a>" . "<a href=\"\">" . zen_image(DIR_WS_TEMPLATE_IMAGES . 'giftcard.jpg', 'Giftcard') . "</a>" . "<a href=\"\">" . zen_image(DIR_WS_TEMPLATE_IMAGES . 'free_item.jpg', 'Free Item') . "</a>"; ?>
When I try to add this code the whole page goes blank:

www.cooltechcentral.com/test