according to the response from Express checkout, the express checkout was processed successfully.
the response from Direct Checkout was:
error Code: 10752
Short Error Message: Gateway Decline
Long Error Message: This transaction cannot be processed.
Reason: The transaction was declined by the issuing bank, not PayPal. The merchant should attempt another card.
see the following for an error reference:
It looks like the merchant bank for the card you used declined the transaction.