building a channel listener on client and open a channel on server side

Hi,
 
I am trying to build a channel from server to client (server ---->
client) so the server could send the messages actively. 
 
I have successfully built a channel from client to server (client ---->
server) using - 
on server side: 
 
    startChannelListener = profile.init(uri, profileConfiguration);
    profileRegistry.addStartChannelListener(uri, startChannelListener,
sessionTuningProperties);
 
and client side:
 
    // builds a session using "AutomatedTCPSessionCreator.initiate(...)"

    channel = session.startChannel(EchoProfile.EchoProfile_URI);
 
After that (there is already a channel "client ---> server"), I try to
build a channel from server to client ("server -----> client") so the
server could actively send messages to client using the same algorithm -
on client side:
 
    startChannelListener = profile.init(uri, profileConfiguration);
    profileRegistry.addStartChannelListener(uri, startChannelListener,
sessionTuningProperties);
 
and server side:
 
    // after the server agree with client's session request, it obtains
a session. 
    session = AutomatedTCPSessionCreator.listen(listenPort,
profileRegistry);    
    channel = session.startChannel(EchoProfile.EchoProfile_URI);
 
It returns the error messages below after the server side tries to start
a channel:
 
    "org.beepcore.beep.core.BEEPError: all requested profiles are
unsupported"
 
Is building a channel from server to client feasible? Or maybe I did
something wrong!  Thanks.
 
 
Russell Hung
[email protected]