Discount coupon does not show in final Order Confirmation page

[peterOSC]

Dear Friends,

After many days struggling, I finally made the paypal express checkout work with discount coupon, but after success of payment in paypal site, it goes back to OSCommerce "Order Comfirmation" page, in this page, it shows the detailed order information and wait for "confirm", but the Sub-total, the Tax and Total do not include the discount coupon amount. I think that the discount information is passed to paypal but is not passed to order_total.php. I believe that this should be my "final" problem before my store is up. I really need your help.

 

Thanks.

 

Peter