Necesito ayuda

[Jat_ibo]

Intento crear una cita en un Calendario de Exchange con el siguiento codigo:
string strApptItem = "";
string strApptRequest = "";
string strMailInfo = "";
string strCalInfo = "";
string strXMLNSInfo = "";
string strHeaderInfo = "";
System.Net.HttpWebRequest PROPPATCHRequest = null;
System.Net.WebResponse PROPPATCHResponse = null;
System.Net.CredentialCache MyCredentialCache = null;
byte[] bytes = null;
System.IO.Stream PROPPATCHRequestStream = null;

// Nombre del servidor
string ExchSvrName = this._server;

// Nombre de Mailbox
string user = Session["usuario"].ToString();

// Cita
strApptItem = "aspnet285.eml";
this._fichero = strApptItem;

// URI del calendario del usuario
// Carpetas publicas
this._url = "http://" + this._server + ":8080/public/Reservas/Coches/Ford Nomade";

//Usuario
//this._url = "http://" + this._server + ":8080/exchange/" + user + "/Calendario";

// Usuario y password del creador de la cita
string domain = Session["dominio"].ToString();
string password = Session["password"].ToString();

// XML namespace info for the WebDAV request.
strXMLNSInfo = "xmlns:g=\"DAV:\" " + "xmlns:e=\"http://schemas.microsoft.com/exchange/\" " + "xmlns:mapi=\"http://schemas.microsoft.com/mapi/\" "+ "xmlns:mapit=\"http://schemas.microsoft.com/mapi/proptag/\" "
+ "xmlns:x=\"xml:\" xmlns:cal=\"urn:schemas:calendar:\" "
+ "xmlns:dt=\"urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/\" "
+ "xmlns:header=\"urn:schemas:mailheader:\" "
+ "xmlns:mail=\"urn:schemas:httpmail:\"";


// Set the appointment item properties. To create an all-day meeting,
// set the dtstart/dtend range for 24 hours or more and set the alldayevent property
// to 1. See the documentation on the properties
// in the urn:schemas:calendar: namespace for more information.
strCalInfo = "<cal:location>WebDAV</cal:location>"
+ "<cal:dtstart dt:dt=\"dateTime.tz\">2005-06-26T23:00:00.000Z</cal:dtstart>"
+ "<cal:dtend dt:dt=\"dateTime.tz\">2005-06-26T23:30:00.000Z</cal:dtend>"
+ "<cal:instancetype dt:dt=\"int\">0</cal:instancetype>"
+ "<cal:busystatus>BUSY</cal:busystatus>"
+ "<cal:meetingstatus>CONFIRMED</cal:meetingstatus>"
+ "<cal:alldayevent dt:dt=\"boolean\">0</cal:alldayevent>"
+ "<cal:responserequested dt:dt=\"boolean\">1</cal:responserequested>"

// Set the reminder time (in seconds).
+ "<cal:reminderoffset dt:dt=\"int\">900</cal:reminderoffset>";

// Set the required attendee of the appointment.
strHeaderInfo = "<header:to>" + user + "</header:to>";

// Set the subject of the appointment.
strMailInfo = "<mail:subject>Insercion desde .NET</mail:subject>"
+ "<mail:htmldescription>otro nuevo archivo</mail:htmldescription>";

// Build the XML body of the PROPPATCH request.
strApptRequest = "<?xml version=\"1.0\"?>"
+ "<g:propertyupdate " + strXMLNSInfo + ">"
+ "<g:set><g:prop>"
+ "<g:contentclass>urn:content-classes:appointment</g:contentclass>"
+ "<e:outlookmessageclass>IPM.Appointment</e:outlookmessageclass>"
+ strMailInfo
+ strCalInfo
+ strHeaderInfo
+ "<mapi:finvited dt:dt=\"boolean\">1</mapi:finvited>"
+ "</g:prop></g:set>"
+ "</g:propertyupdate>";

// Create a new CredentialCache object and fill it with the network
// credentials required to access the server.
MyCredentialCache = new System.Net.CredentialCache();
MyCredentialCache.Add( new System.Uri(this._url),
"NTLM",
new System.Net.NetworkCredential(user, password, domain));

// Create the HttpWebRequest object.
PROPPATCHRequest = (System.Net.HttpWebRequest)HttpWebRequest.Create(t his._url + strApptItem);

// Add the network credentials to the request.
PROPPATCHRequest.Credentials = MyCredentialCache;

// Specify the PROPPATCH method.
PROPPATCHRequest.Method = "PROPPATCH";

// Encode the body using UTF-8.
bytes = Encoding.UTF8.GetBytes((string)strApptRequest);

// Set the content header length. This must be
// done before writing data to the request stream.
PROPPATCHRequest.ContentLength = bytes.Length;

// Get a reference to the request stream.
PROPPATCHRequestStream = PROPPATCHRequest.GetRequestStream();

// Write the message body to the request stream.
PROPPATCHRequestStream.Write(bytes, 0, bytes.Length);

// Close the Stream object to release the connection
// for further use.
PROPPATCHRequestStream.Close();

// Set the content type header.
PROPPATCHRequest.ContentType = "text/xml";

// Create the appointment in the Calendar folder of the
// user's mailbox.
PROPPATCHResponse = (System.Net.HttpWebResponse)PROPPATCHRequest.GetRe sponse();

// Clean up.
PROPPATCHResponse.Close();

Este codigo me inserta como "un mensaje" en la carpeta coches, pero no es capaz de meterlo en el calendario Ford Nomade.

Alguien sabria decirme algo

Salu2