Order total wrong with coupon

[magictom]

Below is the result of a test order. As you can see the total is incorrect.

$22.50Sub-Total:

$4.00* (Most Economical Way):

-$2.25Discount Coupon: blackfriday :

$1.70PA Sales Tax:

$26.11Total:
Discount Coupon
Please type your coupon code into the box next to Redemption Code. Your coupon will be applied to the total and reflected in your cart after you click continue.

Please note: you may only use one coupon per order.

To remove a Discount Coupon from this order type REMOVE and press Enter or Return

Your Current Redemption Code: blackfriday
Redemption Code

[Ajeh]

It would help to know what version of Zen Cart you are running ...

Is this a clean install or an upgrade?

Have you ever tried to use it before?

Has this ever worked correctly?

What kind of Discount Coupon is this?

Amount off? Percentage off?

Are there restrictions on the Discount Coupon?