Okay, self-solved, for the moment. I played around with the 'sort order' of the 'Order Total Modules' section of the module administration. I positioned this module as no.4 and re-positioned the total as no. 5
Hi, I've chosen osCommerce because of this module (no other open source shopping cart system features a per-product discount). Potentially great module so thanks in advance but it does not work for me yet. I installed the module to the instructions exactly and activated it. I have entered a discount code against a product and run through the purchase of that product. The discount line is not appearing in the 'Order Confirmation' screen of the checkout process and the total is not affected by the discount. Is anybody else having an issue with this module? Any advice appreciated...