"The coupon code you have entered is not valid." in General Add-Ons Support Posted June 23, 2009 This one.... http://www.oscommerce.com/community/contributions,4269 what can i do? in the database the code is ok too!!! This won't help alot, but I've had similar problems. What I've ended up doing is deleting the code and creating a new one and eventually it works, no idea why though.