I am playing with web Services and soap and in the article I am using I
created a page:

***********************************************************************
<%@ WebService Language="c#" Class="FirstWebService" %>

using System;
using System.Web;
using System.Web.Services;

public class FirstWebService {

     [WebMethod]
     public string HelloWorld(string lcName) {
       return "Hello World, " + lcName;
     }

     [WebMethod]
     public decimal AddNumbers(decimal lnNumber1, decimal lnNumber2)   {
           return lnNumber1 + lnNumber2;
     }

     /*

     [WebMethod]

     public DateTime GetServerTime()     {

           return DateTime.Now;

     }  */
}
***********************************************************************

If I call http://localhost/FirstWebService.asmx, I get the services test
windows fine.

But if I do:
http://localhost/FirstWebService.asmx/AddNumbers?lnNumbers1=10&lnNumber2=20

I get an error:
***********************************************************************************
Request format is unrecognized.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Request format is
unrecognized.

Source Error:

An unhandled exception was generated during the execution of the current web
request. Information regarding the origin and location of the exception can
be identified using the exception stack trace below.

Stack Trace:

[InvalidOperationException: Request format is unrecognized.]
  System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type
type, HttpContext context, HttpRequest request, HttpResponse response) +388
  System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext
context, String verb, String url, String filePath) +94
  System.Web.HttpApplication.MapHttpHandler(HttpContext context, String
requestType, String path, String pathTranslated, Boolean useAppConfig) +699
  System.Web.MapHandlerExecutionStep.System.Web.HttpApplication+IExecutionStep.Execute()
+95
  System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
completedSynchronously) +173
**************************************************************************************************

What is missing?

Thanks,

Tom