I would need more information on this:

a) what version of .NET are you running?
b) what version of the API are you running?
c) is it possible to test the current development version from subversion? I
made some more details
    available there on the type of authentication error that might happen?
d) can you capture the HTTP traffic to give us more details?

Right now i would guess that this is a .NET 2.0 system and you get a keep
alive error (common .net 2.0 issue).

You could try this:

http://code.google.com/p/google-gdata/wiki/KeepAliveAndUnderlyingConnectionIsClosed

and see if that solves the problem..

Frank
On 3/27/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
>
> Hi, I had download de .net api
> Now I have this error: Execution of authentication request failed
> This occurs alternate, once work, another not, after work again ->
> work, don't work, work, don't work
>
> Below my code:
>
> try
>
> {
>
>     CalendarService googleCalendar = new CalendarService(sistema);
>
>     googleCalendar.setUserCredentials(usuario, senha);
>
>     EventQuery eventQuery = new EventQuery();
>
>     eventQuery.Uri = new Uri("http://www.google.com/calendar/feeds/
> default/private/full");
>
>     eventQuery.StartTime = DateTime.Parse(oldInicio.ToString("yyyy-MM-
> ddTHH:mm:ss"));
>
>     eventQuery.EndTime = DateTime.Parse(oldFim.ToString("yyyy-MM-
> ddTHH:mm:ss"));
>
>
>     
> ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
>
>     EventFeed resultsQuery = googleCalendar.Query(eventQuery); //Here
> is where the ERROR happen
>
>
>     
> /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
>
>     When eventTimes;
>
>     foreach (EventEntry evento in resultsQuery.Entries)
>
>     if (evento.Title.Text == oldTitulo &&
> evento.Times[0].StartTime==oldInicio &&
> evento.Times[0].EndTime==oldFim)
>
>     {
>
>     evento.Authors.Add(new AtomPerson(AtomPersonType.Author, autor));
>
>     evento.Title = new
> AtomTextConstruct(AtomTextConstructElementType.Title, titulo);
>
>     evento.Summary = new
> AtomTextConstruct(AtomTextConstructElementType.Summary, sumario);
>
>     evento.Content.Content = texto;
>
>     eventTimes = new When();
>
>     string inicioEvento = inicio.ToString("yyyy-MM-ddTHH:mm:ss");
>
>     string fimEvento = fim.ToString("yyyy-MM-ddTHH:mm:ss");
>
>     eventTimes.StartTime = DateTime.Parse(inicioEvento);
>
>     eventTimes.EndTime = DateTime.Parse(fimEvento);
>
>     evento.Times.Add(eventTimes);
>
>     evento.Update();
>
>     break;
>
>     }
>
> }
>
> catch (Exception e)
>
> {
>
> throw new InvalidCastException("NÆo foi poss¡vel alterar o evento no
> calend rio Google\n" + e.Message);
>
> }
>
>
> Adriano Rodenbusch
>
>
> >
>

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