EJB reference not bound

I'm running JBoss 3.0.1 with Tomcat 4.0.4 bundle. I have successfully deployed a EJB to Jboss and created 2 clients (java & JSP client).
For some reasons, I'm able to run the java client but when I try the JSP client (served by Tomcat) I get this error message
javax.servlet.ServletException: Name greetings is not bound in this Context
Below is the code for the 2 clients & web.xml
<----------- jsp client -------------->
<%@ page import="javax.naming.*,
java.util.*,
java.util.Hashtable,
javax.rmi.PortableRemoteObject,
com.stardeveloper.ejb.session.*"%>
<%
long t1 = System.currentTimeMillis();
InitialContext ctx = new InitialContext();
Object ref = ctx.lookup("ejb/First");
FirstHome home = (FirstHome) PortableRemoteObject.narrow (ref, FirstHome.class);
First bean = home.create();
String time = bean.getTime();
bean.remove();
ctx.close();
long t2 = System.currentTimeMillis();
%>
<html>
<head>
<style>p { font-family:Verdana;font-size:12px; }</style>
</head>
<body>
<p>Message received from bean = "<%= time %>".<br>Time taken :
<%= (t2 - t1) %> ms.</p>
</body>
</html>

<----------- java client ------------->
import javax.naming.*;
import com.stardeveloper.ejb.session.*;
import java.util.Hashtable;
import javax.rmi.PortableRemoteObject;
import com.stardeveloper.ejb.session.*;
class firstEJBclient {
public static void main(String[] args) {
try {
long t1 = System.currentTimeMillis();
InitialContext ctx = new InitialContext();
System.out.println("Got CONTEXT");

Object ref = ctx.lookup("ejb/First");
System.out.println("Got REFERENCE");

FirstHome home = (FirstHome) PortableRemoteObject.narrow (ref, FirstHome.class);
First bean = home.create();
String time = bean.getTime();
bean.remove();
ctx.close();
long t2 = System.currentTimeMillis();
System.out.println("Message received from bean = "+time+" Time taken : "+(t2 - t1)+" ms.");
}
catch (Exception e) {
System.out.println(e.toString());
}
}
}

<----------------- web.xml -------------------->
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<session-config>
<session-timeout>
1800
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>
firstEJB2.jsp
</welcome-file>
</welcome-file-list>
<ejb-ref>
<description>A reference to an entity bean</description>
<ejb-ref-name>ejb/First</ejb-ref-name>
<ejb-ref-type>Stateless</ejb-ref-type>
<home>com.stardeveloper.ejb.session.FirstHome</home>
<remote>com.stardeveloper.ejb.session.First</remote>
</ejb-ref>
</web-app>
Why is it not bound?

The name it's not finding is 'greetings'. Where in the JSP are you trying to get this?

Same problem with JSP on Apache tomcat 5.0 and session bean on WebLogic:
part of my JSP:

<%
try{
Properties env = /*System.getProperties();*/ new Properties();
env.put(Context.PROVIDER_URL, "t3://localhost:7001");
env.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL, "weblogic");
env.put(Context.SECURITY_CREDENTIALS, "weblogic");
Context ctx = new InitialContext(env);
Object ref = ctx.lookup("sample.MyFirstSession");
MyFirstSessionHome home = (MyFirstSessionHome) PortableRemoteObject.narrow(ref, MyFirstSessionHome.class);
MyFirstSession sess = home.create();
%><%=sess.giveMeSomething()%><%
}catch(Exception e){
%><%=e.toString()%><%
}
%>

What's the problem in?