Could not find the Sender's mailbox.(CDO Library for exchange)

[Nitin1981]

Hi All! I'm using "Microsoft CDO For Exchange 2000 Library" along with Microsoft ActiveX Data Objects 2.5 Library to send mails using Exchange server. I've tried running the code with all possible ammendments but to no avail. I always get the "Could not find the Sender's mailbox" error.My code is given below.

CDO.Message iMsg = new CDO.Message();
CDO.Configuration iConf = new CDO.Configuration();
ADODB.Fields Flds = null;

 try
 {

     Flds = iConf.Fields;
     Flds\["http://schemas.microsoft.com/cdo/configuration/sendusing"\].Value  = 3;
     Flds\["http://schemas.microsoft.com/cdo/configuration/smtpserver"\].Value  = "<220.220.220.91>";
     Flds\["http://schemas.microsoft.com/cdo/configuration/sendusername"\].Value = "Nitin.Vij";  //Nitin.Vij
     Flds\["http://schemas.microsoft.com/cdo/configuration/sendpassword"\].Value  = "common";
     Flds\["http://schemas.microsoft.com/cdo/configuration/smtpserverport"\].Value = 25;
     Flds\["http://schemas.microsoft.com/cdo/configuration/MailboxURL"\].Value = "http//Exchange/Exchange/Nitin.Vij/Inbox"; 
     Flds.Update();
     iMsg.Configuration = iConf;
     iMsg.MimeFormatted = false;
     iMsg.AutoGenerateTextBody = false;
     iMsg.To = "Nitin.Vij@Domain.com";    
     iMsg.Subject = "Test mail from Nitin";
     iMsg.Sender = "Nitin.Vij@Domain.com";               
     iMsg.TextBody = "Test";
     //iMsg.From = "Nitin.Vij@Domain.com";                  
      iMsg.Send();
      Console.ReadLine();
 }
 catch(Exception ex)
 {
        Console.WriteLine(ex);
 }

Any help is highly appreciated.

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