奇怪的错误作为SOAP消息的响应

Question

我刚刚开始使用Web Service，SOAP消息和端点，而我尝试发送的肥皂消息有一个小问题。 我使用此代码连接到wsdl端点

public class MessageProcessorTestClient : IMessageProcessorServiceContract {
   #region Implementation of IMessageProcessorServiceContract

   public void SubmitDocument(string documentXml, IcisNetSecurityToken token, MessageTypeIcisNet type) {
      //Test enviroment force TLS 1.2
      ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
      ServicePointManager.ServerCertificateValidationCallback += (se, cert, chain, sslerror) => {
         return true;
      };

      ServicePointManager.Expect100Continue = false;
      using (MessageProcessorPortTypeClient client = new MessageProcessorPortTypeClient()) {

         ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
         client.ClientCredentials.UserName.UserName = "username";
         client.ClientCredentials.UserName.Password = "password";

         MessageSubmissionRequest req = new MessageSubmissionRequest {
            DigitallySignedMessage = new SubmittedXMLMessageInfo {
               isXmlString = true,
               messageType = MessageHelper.GetTestMessageType(type),
               xmlMessage = documentXml
            },

            traderID = token.Afm,
            wsUserID ="wsUsername",
            wsPass = "wsPass"
         };

         client.Open();
         MessageSubmissionRequestResult result = client.processIncomingMessage(req);

         if (result.resultState.status != RequestState.OK) {
            throw new MessageException(ResultToString(result.resultState),
            ErrorsToString(result.ProcessingErrors));
         }
      }
   }
}

我还使用代码对XSD创建位于以下位置的XML： https://portal.gsis.gr/icisnetcms/getFile?ClazzName=com.unisystems.icisnet.cms.ProdcompAttachments&UID=10579260&MemberName=Upload&language=GR

我已经成功连接了端点，但是返回了错误。

  

RulesConditionasError：SubmittingTraderIdentification（[SubmittingTraderIdentification：null]必须与交易者ID（120087250）相同

在我的肥皂消息中，我已经声明了SubmittingTraderIdentification

<SubmittingOperator>                  
   <SubmittingOperatorIdentification>120087250</SubmittingOperatorIdentification>
   <SubmittingTraderIdentification>128892649</SubmittingTraderIdentification>
</SubmittingOperator>

端点位置是： https://www2.gsis.gr/wsicisnet/MessageProcessorService?wsdl

有人可以告诉我我发错了什么吗？ 他们提供的文档确实很差，当我通过电话与他们联系时，他们说他们看到的消息似乎是正确的，但是他们不知道我为什么收到此回复。

我不知道是否应该添加其他任何东西，这样有人可以帮我吗。