Now the code in servlet works. I wrote in servlet init method | InitialContext context = new InitialContext(); | DataSource ds = (DataSource)context.lookup("java:/FIrebirdDS"); | Connection con = ds.getConnection(); | Statement st=con.createStatement(); | ResultSet rs=st.executeQuery("select * from person"); | Everything works fine, there are proper data in ResultSet after executing st.executeQuery method. So, FIrebirdDS works. But the old problem stays. In the same servlet init method I try to use my EJB: | Object ref = context.lookup("ejb/Person"); | home = (Person) ref; | Again, it works, I can then execute the business method of my PersonBean. But when inside PersonBean EJB I uncomment the line //@PersistenceContext EntityManager em; I get an exception 8:50:56,093 ERROR [STDERR] javax.naming.NameNotFoundException: ejb not bound 18:50:56,093 ERROR [STDERR] at org.jnp.server.NamingServer.getBinding(NamingServer.java:529) 18:50:56,093 ERROR [STDERR] at org.jnp.server.NamingServer.getBinding(NamingServer.java:537) 18:50:56,093 ERROR [STDERR] at org.jnp.server.NamingServer.getObject(NamingServer.java:543) 18:50:56,093 ERROR [STDERR] at org.jnp.server.NamingServer.lookup(NamingServer.java:267) 18:50:56,093 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:625) 18:50:56,093 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:587) 18:50:56,093 ERROR [STDERR] at javax.naming.InitialContext.lookup(InitialContext.java:351) 18:50:56,093 ERROR [STDERR] at web.ComputeServlet.init(ComputeServlet.java:56) 18:50:56,093 ERROR [STDERR] at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1105) ... where web.ComputeServlet.init(ComputeServlet.java:56) is line Object ref = context.lookup("ejb/Person"); of my servlet. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4008868#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...