I was just able to use the coupon and check out using IE on Windows platform pc. I sent an e-mail to eFrontier yesterday stating that I had tried all sorts of combinations of the coupon code (which I included in the message) but that I had not noticed anything about having to activate it and that my husband (probably hoping to block my Poser shopping) had deleted the original e-mail. I don't know if they did something on their end to make it work for my account (did not receive any e-mails from them) or they just finally got it fixed.