I am trying to connect & exchange data with IMAP server using SSL.
IMAP has command for logging in. Ex:
A100 LOGIN "abc" "agc"

I am using following code to do this...

m_pSocket.Connect(  m_pobjIMapServerIPAddress, 993);
m_pNetworkStream = new System.Net.Sockets.NetworkStream(    m_pSocket
);

System.Net.Security.RemoteCertificateValidationCallback
objRemoteCertificateValidationCallback =
                 new
System.Net.Security.RemoteCertificateValidationCallback(ValidateServerCertificate);
System.Net.Security.LocalCertificateSelectionCallback
objLocalCertificateSelectionCallback =
               new
System.Net.Security.LocalCertificateSelectionCallback(SelectLocalCertificate);

System.Net.Security.SslStream m_objSllStream = new
System.Net.Security.SslStream(m_pNetworkStream, true,
objRemoteCertificateValidationCallback,
objLocalCertificateSelectionCallback);

sCmd = "A123" + " LOGIN " + "username" + " " + "Password";
m_objSllStream.Write(System.Text.Encoding.ASCII.GetBytes(sCmd.ToCharArray()),
0,    sCmd.Length); /// I get crash here

My questions are..
I think, when the server sends security certificate to client, I should
get callback.
But none of my callbacks are getting called.
Pls let me know which objects to use & how to use.

Thanks
Ramesh