Fatal error: Call to undefined function print_settings_default()

Hi there,

I'm running Drupal 5.21 and print 4.9 and when I activate the module, I get this error on all of my pages:

Fatal error: Call to undefined function print_settings_default() in /home/cnotes/public_html/themes/platform/template.php on line 698

Here is the code around 698:

/**
 * Format the Printer-friendly link
 *
 * @return
 *   array of formatted attributes
 * @ingroup themeable
 */
function phptemplate_print_format_link() {
  $print_settings = variable_get('print_settings', print_settings_default());               <-------------- Line 698
  $text = t('Print');
  $img = base_path() . drupal_get_path('module', 'print') .'/icons/print_icon.gif';
  $title = t('Display a printer-friendly version of this page.');
  $class = 'print-page';
  $format = _print_format_link_aux($print_settings['show_link'], $text, $img, $title, $class);

  return array('text' => $format['text'],
               'html' => $format['html'],
               'attributes' => $format['attributes'],
              );
}

Any guidance would be greatly appreciated as I've had this module working before, but when I upgraded my Drupal versions, it no longer works and my users are requesting to have it back.

Thanks!
-Chris