I've the same problem but i've fixed it. i'm working with JBOSS 4.0. personaly in my pc IIS services was running, and that was the problem, so i've stopped it : start -> configuration pannel -> administration tools -> services -> stop IIS after that it works!! when I started the client my client code : public static void main(String[] args) { | String str = "This is the string being counted in the EJB."; | Hashtable environment = new Hashtable(); | | environment.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory"); | | environment.put(Context.URL_PKG_PREFIXES,"org.jboss.naming:org.jnp.interfaces"); | | environment.put(Context.PROVIDER_URL, "jnp://127.0.0.1:1099"); | | Ccount cc = null; | try { | CcountHome home = CcountUtil.getHome(environment); | cc = home.create(); | System.out.println(str); | System.out.println(" Upper case: " + cc.upper(str)); | System.out.println(" Lower case: " + cc.lower(str)); | System.out.println(" Spaces: " + cc.spaces(str)); | System.out.println(" Total: " + cc.characters(str)); | | } catch (Exception e) { | | e.printStackTrace(); | | } | | | | | } View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4231735#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...