Why $0,00 are shown when I try to make the payment?

Depending on your bank and the credit card that you are using, you may have to confirm the first transaction with an additional token or a password, an amount of 0.00 EUR/USD may be displayed on the payments dialog. 

This is normal, your credit card has to be pre-authorized and the correct amount will be debited in the next step.

If the process is successful the amount stated in the invoice will be charged in the next step.