Hello. I'm having trouble getting this to work. I am attempting to test this out on a fresh 1.5.4 install on wamp on my local server. I have currently tried installing the mega menu on the responsive avonlee contempo template, and the normal avonlee contempo template, to no avail. The problem comes after I add the code to tpl header:

"3. In your favorite plain text editor, open the includes/templates/YOUR_TEMPLATE/common/tpl_header.php file. If you do not already have this file in your template override directory, make an override for it by coping the includes/templates/template_default/common/tpl_header.php to includes/templates/YOUR_TEMPLATE/common/tpl_header.php.

Directly before the ending line:

<?php } ?>

Add this code:

<!--bof-mega menu display-->
<?php require($template->get_template_dir('tpl_mega_menu.php',DIR_WS_TEMPLATE, $current_page_base,'common'). '/tpl_mega_menu.php');?>
<!--eof-mega menu display-->
<div class="clearBoth"></div>

Save the file."

What happens is everything on the website disappears except the header. It is strange, and I am not sure what is the problem. Is this menu compatible with 1.5.4?