Parse time not showing in footer, but queries and query time do

I've enabled the "Display the page parse time" feature from within admin>configuration>logging, but for some reason it's only showing a dash in the footer of my page for parse time. However, the number of queries and query time show up just fine. Here's an example:

Parse Time: - Number of Queries: 230 - Query Time: 0.045555980972291

Any idea how I can get it to show the actual parse time?

Thanks,

What version of Zen Cart?
What addons/contributions/mods have you installed?
What template is your site based on?
What customizations have you made to your footer?

Version: ZenCart 1.3.5
Addons: Image Handler2
Template: Custom version done by our designer. I assume based on the default template.
Footer changes: Again, custom. However, I copied and pasted the following config lines into the tpl_main_page.php

<?php
  if (DISPLAY_PAGE_PARSE_TIME == 'true') {
?>
<div class="smallText center">Parse Time: <?php echo $parse_time; ?> - Number of Queries: <?php echo
 $db->queryCount(); ?> - Query Time: <?php echo $db->queryTime(); ?></div>
<?php
  }
?>

Was there something else I missed in the original tpl_main_page.php file? (The site is the same as in my signature, if you want to see firsthand)

Thanks,

If you removed this from your template, you will not have the footer actions running properly, and thus will display no information:```

Thanks Dr. Byte, that did it!