Coupon Code making my Credit Card Transactions Decline

I have a store set up at shopgoldenpony.com. There's a coupon setup with the following information.

name:welcome
amount:15%
minimum order: 1.0000
Coupon Code: a2bf6b3a97
start date: 20, january, 2010
end date, 28, february, 2010
coupon zone restriction: none

My payment gateway is linkpoint. Running a credit card transaction without a code works fine. However, applying the code (which seems to work), and then trying to complete the transaction results in a declined credit cart transaction.

I've searched, and searched.... and searched... and there's a few threads referencing the problem with no real solution. Has anyone ever had this problem and/or a fix?

It seems kind of like a big deal to not have been documented. Thanks.

nevermind, figured it out. I was installing the patch in the wrong directory.

Thank you for reporting back with the results of your issue. Don't feel bad, we have all made similar mistakes. Hopefully someone else will benefit from your help.

What exactly did you patch to fix this problem? My client is having trouble processing cc transactions and I wonder if it has to do with coupon codes as well.