hi, all i followed the Tutorial doc 1.5 in detail but got failure javax.servlet.ServletException: Lookup of java:comp/env/ejb/Fibo faild | at tutorial.web.ComputeServlet.init(ComputeServlet.java:58) | at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1105) | at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:757) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:13 | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:17 | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociation | va:175) Here is my environment: jdk1.5.0_10 Eclipse3.2 IDE2.0.0 Beta2 JBoss 4.0.5GA I didnot creat FiboEJB-client.jar and it must not be the problem of duplicated interfaces in war and jar. And i have also tried with java:env/ejb/Fibo and ejb/Fibo But still failed. Can anyone help me? thanks! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3996348#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...