For production set the following URL:
https://secure.docdatapayments.com/ps/services/paymentservice/1_1?wsdl1
For testing the payment gateway set this URL:
https://test.docdatapayments.com/ps/services/paymentservice/1_1?wsdl
https://test.docdatapayments.com/ps/services/paymentservice/1_1?wsdl