Java EE (Java Enterprise Edition) General Discussion

I've got myself a Java EE book and started learning. So, the first EJB3 example was as following:

package beans;
import javax.ejb.Remote;
@Remote
public interface SimpleSession
{
    public String getEchoString(String clientString);
}

package beans;
import javax.ejb.Stateless;
@Stateless
public class SimpleSessionBean implements SimpleSession {
      public String getEchoString(String clientString) {
         return clientString + " - from session bean";
      }
}

package client;
import beans.SimpleSession;
import javax.naming.InitialContext;
public class SimpleSessionClient {
   public static void main(String[] args) throws Exception
   {
      InitialContext ctx = new InitialContext();
      SimpleSession simpleSessio = (SimpleSession) ctx.lookup(SimpleSession.class.getName());
      for (int i = 0; i < args.length; i++) {
         String returnedString = simpleSession.getEchoString(args);

System.out.println("sent string: " + args[i] + ", received string: " + returnedString);

}

}

}
For some reason, I can't run this. I opened the command prompt, typed
set CLASSPATH=.;C:\java\jboss\lib\concurrent.jar;C:\java\jboss\lib\jboss-common.jar;C:\java\jboss\server\all\lib\jboss.jar;C:\java\jboss\server\all\lib\jboss-remoting.jar;C:\java\jboss\server\all\lib\jboss-transaction.jar;C:\java\jboss\server\all\lib\jnpserver.jar;C:\java\jboss\server\all\deploy\ejb3.deployer\jboss-ejb3.jar;C:\java\jboss\server\all\deploy\ejb3.deployer\jboss-ejb3x.jar;C:\java\jboss\server\all\deploy\jboss-aop.deployer\jboss-aop.jar;C:\java\jboss\server\all\deploy\jboss-aop.deployer\jboss-aspect-library.jar
My CLASSPATH sys variable is set to include every jar in JavaEE\lib directory. I did "jar cf SimpleSessionApp.ejb3 beans\*.java" and copied the resulting ejb3 into jboss\server\all\deploy. Then, when  tried running the accursed thing with 
java -Djava.naming.factory.initial=org.jnp.interfaces.NamingContextFactory -Djava.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces -Djava.naming.provider.url=localhost client.SimpleSessionClient Now is the time for all good men
it said 
Exception in thread "main" javax.naming.NameNotFoundException: beans.SimpleSession not bound

at org.jnp.server.NamingServer.getBinding(NamingServer.java:529)
I know it has to be a very bothersome question, but could you please help me understanding what happened here and how should I resolve it? I get the concept of binding a name to a resource beforehand and asking for it later, but what I do not get is where should I have done it so that I do not get this error...