Discount Code Module on oscommerce, so close!

[krys]

I've had a world of problems trying to install the discount code add on for the oscommerce site.

 

I've got to the point where I can now login and go to catalog/modules and see the discount code there to install, but when i click on it I get the following error...

Fatal error: Class 'ot_discount' not found in /home/flishclo/public_html/admin/modules.php on line 47

 

 

Looking at line 47 this is what is there onwards:

        include($module_directory . $class . $file_extension);

          $module = new $class;

          if ($action == 'install') {

            $module->install();