rmi-applet communication

[manoj augustine]

I tried to work on a chat program using rmi with apllet as client I am able to contact server from the applet.That is a method from the server can be invoked from the applet.But we are not able to invoke a method from the applet client from the server.And we are getting an exception Netscape.security.ApletSecurityException:security could'nt connect to the IP address of our machine .in order to run swing in applet we installed a plugin and it is working perfectly.
We are getting the same exception if we try from different machine .Can somebody help me