99% of credit card payment failures are due to:
1. Wrong billing address in your client area or at checkout (Note: Profile address and Billing Address must match accordingly to your billing info)
2. Not entering the CVC code at checkout
3. Not entering the billing zip correctly (note: it only needs to be 5 digits)
4. Insufficient Funds.
If everything is correct clear payment info from your Account and Try Payment again. To do this Click on your name in the upper right corner after logging in to client area. After clicking on your name Select "Payment Methods" tab after clicking there you can clear all stored payment info. After you have done this Try payment again and refer to 1-4 above!
If all else fails, once in your invoice click on drop down box and choose other payment method option in your invoice.
