Delphi客户端和ASMX服务。操作未收到数据

I have a built a simple ASMX service using Visual Studio 2010. I am have build a simple service client application (form) using Delphi 7. I have used WSDLImport to create a proxy file that contains all type definitions and service operations. Here is the code for the WebService11.pas file.I have a built a simple ASMX service using Visu