Cross-sell is working for me on the product page but not on the shopping cart page for some reason. It's just not being displayed. No error messages.

Here's the output from the 'require':

includes/modules/classic/cart_upsell.php
includes/templates/classic/templates/tpl_modules_also_purchased.php


<!-- bof Ultimate Cross Sell Combo -->
<?php require(DIR_WS_MODULES . zen_get_module_directory(FILENAME_CART_UPSELL)); ?>
<?php require($template->get_template_dir('tpl_modules_also_purchased.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_modules_also_purchased.php'); ?>
<!-- eof Ultimate Cross Sell Combo -->

Help?