I saw a cupon code to get moral potions in the LOTRO store sales this week. I read the cupon guide, and it seems to say that you have to enter the cupon code when your about to pay for something. I did as they said, but a message appeared after I entered the code saying it was invalid. I now I typed in the right code, and I followed the cupon guide. What gives? Should I enter the cupon code on my account page? I am confused. What should I do?