我遇到了问题：
SipCallback callback = new SipCallback();
MySipStack mSipStack = new MySipStack(callback, realm, impi, impu);
MyMessagingSession shortMessageSession = new MyMessagingSession(mSipStack, this.remotePartyUri);
shortMessageSession.SendTextMessage(this.msgtextbox.Text);
shortMessageSession.Dispose();
如上所述，我无法发送消息，我收到以下错误：
file: "..\..\..\..\..\..\doubango\branches\2.0\doubango\tinyNET\src\tnet_utils.c"
line: "357"
MSG: Not implemented on your OS
***ERROR: function: "tsip_api_message_send_message()"
file: "..\..\..\..\..\..\doubango\branches\2.0\doubango\tinySIP\src\api\tsip_api_message.c"
line: "69"
MSG: Stack not started.
*INFO: *** SIP Session destroyed ***
如何成功发送消息？
问候