Web service Http 500 err: unrecognized request format

[tesis]

Hi all gurus,
some days ago my IIS5 (XpPro SP2) had stopped working; since then I have
deinstalled all HotFix, then SP2, then .NET Framework 1.1, then IIS 5,
then reinstalled IIS5, SP2, all proposed WinUpdates, then IIS5, then
..Net Framework, then have run aspnet_regiis /i, ended with no errors.
ASP.NET apps run correctly, while web services not, ending with a
"HTTP500 - internal server error". Update key brings up an error:
[InvalidOperationException: Formato della richiesta non riconosciuto.]
(unrecognized request format ?)

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

System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpCo
ntext context, String verb, String url, String filePath)
System.Web.HttpApplication.MapHttpHandler(HttpContext context, String
requestType, String path, String pathTranslated, Boolean useAppConfig)

System.Web.MapHandlerExecutionStep.System.Web.HttpApplication+IExecution
Step.Execute()
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
completedSynchronously)


I've NOT found errors like this in this NG. Can pls some1 help me, even
pointing me to the right direction? TIA

 

[tesis]

Hi all,
I've performed some narrowing; simple web service like "Hello world"
works well, but when I try to return a filled dataset thru a web
service, I get the error. The same service has worked unchanged from
about three month till some days ago. Of course, I made no change. Any
clue?

 

[Saverio Tedeschi]

Solved. It was an authentication error.