log("Downloading signed files. The signing set ID is: " + id);
SOAPMessage message = SOAP_MSG_FACTORY.createMessage();
SOAPBody body = populateEnvelope(message, NS);
SOAPElement getSigningSetDetails = body.addChildElement("getSigningSetDetails", NS);
SOAPElement getSigningSetDetailsRequest =
getSigningSetDetails.addChildElement("getSigningSetDetailsRequest", NS);
addCredentials(getSigningSetDetailsRequest, this.userName, this.password, this.partnerCode);