The reason(s) might be one of which mentioned below:
1. Your card information is not correct;
2. You don't have enough money on your card;
3. Your card doesn't have "3D secure" code. We would like to inform you that "3D secure" code is NOT a CVV2/CVC2 code which is written on the back of your card. Please, contact your bank to get "3D secure" code OR use another card with "3D secure" code.