reasons for paypal 10544 Gateway Decline error

Hi Can you please give me the possible reasons for pay pal DoDirectPayment 10544 Gateway Decline error. I have searched a lot I couldn't find 开发者_运维问答the reasons for it.

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First the obligatory "stupid human trick" question: Are you sure that the card you're using is a valid credit card? If you're in live (as opposed to sandbox), the sample card numbers they give will no longer work, and you must use a real credit card.

With that out of the way, is the account setup for DoDirectPayment? Do you have a certificate? If you're sure everything is setup properly and you're still receiving the error, try posting the actual API request here so we can take a look at your problem.