I am trying to create an appointment in the Microsoft Outlook (2003) calender of another person using the below code.While running this program, The Appointment is getting saved in my calender.But not being sent to the recipient.

try
{
    Microsoft.Office.Interop.Outlook.Application app = null;
    Microsoft.Office.Interop.Outlook.AppointmentItem appt = null;

    app = new Microsoft.Office.Interop.Outlook.Application();

    appt = (Microsoft.Office.Interop.Outlook.AppointmentItem)app
        .CreateItem(Microsoft.Office.Interop.Outlook.OlItemType.olAppointmentItem);
    appt.Subject = "Meeting ";
    appt.Body = "Test Appointment body";
    appt.Location = "TBD";
    appt.Start = Convert.ToDateTime("12/23/2009 05:00:00 PM");
    appt.Recipients.Add("[email protected]");
    appt.End = Convert.ToDateTime("12/23/2009 6:00:00 PM");
    appt.ReminderSet = true;
    appt.ReminderMinutesBeforeStart = 15;
    appt.Importance = Microsoft.Office.Interop.Outlook.OlImportance.olImportanceHigh;
    appt.BusyStatus = Microsoft.Office.Interop.Outlook.OlBusyStatus.olBusy;
    appt.Save();
    appt.Send();
}
catch (COMException ex)
{
    Response.Write(ex.ToString());
}

Am i missing anything? Can any one help me out to solve this issue?