Hi friend's i am calling my ejb class using this code public class Client { public static void main(String[] args) throws Exception { CalculatorRemote calculator =null; Properties properties = new Properties(); properties.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory"); properties.put("java.naming.provider.url", "jnp://localhost:1099"); properties.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces"); properties.put("jnp.socket.Factory", "org.jnp.interfaces.TimedSocketFactory"); Context ctx = new InitialContext(properties); CalculatorRemote obj = (CalculatorRemote)ctx.lookup("CalculatorBean/remote"); System.out.println("1 + 1 = " + calculator.add(1, 1)); System.out.println("1 - 1 = " + calculator.subtract(1, 1)); } } but always get this exception Exception in thread "main" java.lang.ClassCastException: javax.naming.Reference cannot be cast to org.jboss.tutorial.stateless.bean.CalculatorRemote at org.jboss.tutorial.stateless.client.Client.main(Client.java:26) i am using jboss-5.1.0.GA and jdk1.6 please help me View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4253258#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...