How to get session cookie

[Bo Xie]

Hi,

 I have set a service to transport session scope and the session context
worked as expected. But when I try to get the session cookie id, it always
returns null.
       MessageContext cxt = MessageContext.getCurrentMessageContext();
       SessionContext session = cxt.getSessionContext();
       String cookieId = session.getCookieID();

 On the client side, I used the following code, it also always return null.

       stub._getServiceClient().getOptions().getProperty(
org.apache.axis2.transport.
                   http.HTTPConstants.COOKIE_STRING)

 Can someone shed some lights on how to get the cookie?

Thanks,
-Bo