Hi,

I (also) have created Webservice project in Visual Studio 2003, by default
it is
created the Service.asmx file with the code as

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

I can build this project, I can see first and second pages of asp result
(meaning list of methods and method test button), but when
choose HelloWorld test button I get an HTTP 500 error (internal server
error).
When I refresh (F5) the HTML error page, I get more information you can read
below.

I use .NET 1.1.4, IIS5 and don't understand what happends.

Thanks in advance.

Regards

Stack
[InvalidOperationException: Format de demande non reconnu.] (unknown demand
format)

System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type
type, HttpContext context, HttpRequest request, HttpResponse response)

System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContex
t context, String verb, String url, String filePath)
  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

Make sure your machine.config file is not corrupt.  Open \Microsoft.NET\Framework\v2.0.50727\CONFIG\machine.config and make sure there is only one closing </configuration> tag.

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