I'm trying to translate because I have same problem: Problem with Hentai Clicker (maybe with Hentai Heroes too). When I fill in the card details, put all the checkboxes and click on "Pay Now" - only the answer "Undefined"is displayed. Not working with Visa Card, not working with Maestro Card and also not working with Mastercard. It's because I'm from Russia (saselec's motherland; I'm from Belarus) or what? How can this problem be solved?