.net - PayPal:DoDirectPayment is returning null -


pay pal api, paypalapiasoapbinding.dodirectpayment (dodirectpaymentreq) returning null, here details endpoint , credit card number details endpoint url:https://api-3t.sandbox.paypal.com/2.0/ credit card: visa (4012888888881881) below test accounts(https://www.paypalobjects.com/en_us/vhelp/paypalmanager_help/credit_card_numbers.htm)

regards, satya


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