Detalle del error:
System.Web.HttpException (0x80004005): Ésta es una solicitud de recursos Web no válida.
en System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler.ProcessRequest(HttpContext context)
en System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
en System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
en System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)