Hi, folks, I am using JBoss 4.2.3/5.1 and trying to get Mail Server 1.0M3(or 4,5) worked with it. I follow the instructions provided by this community. mail.ear is installed to C:\jboss-4.2.3.GA\server\default\deploy However, when JBoss is starting, it reports the error like: [org.jboss.deployment.SARDeployer] create operation failed for package file:/C:/jboss-4.2.3.GA/server/default/deploy/mail.ear/mail.sar/ org.jboss.deployment.DeploymentException: - nested throwable: (java.lang.reflect.UndeclaredThrowableException) at org.jboss.system.ServiceConfigurator.install(ServiceConfigurator.java:196) at org.jboss.system.ServiceController.install(ServiceController.java:226) at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)... Caused by: java.lang.reflect.UndeclaredThrowableException at org.jboss.system.ServiceCreator.install(ServiceCreator.java:236) at org.jboss.system.ServiceConfigurator.internalInstall(ServiceConfigurator.java:451) at org.jboss.system.ServiceConfigurator.install(ServiceConfigurator.java:171) ... 80 more Caused by: java.lang.NoClassDefFoundError: org/jboss/aop/JoinPoint at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Unknown Source) at java.lang.Class.getConstructor0(Unknown Source) at java.lang.Class.getConstructor(Unknown Source) at org.jboss.mx.server.MBeanServerImpl.instantiate(MBeanServerImpl.java:1232) at org.jboss.mx.server.MBeanServerImpl.instantiate(MBeanServerImpl.java:286) at org.jboss.mx.server.MBeanServerImpl.createMBean(MBeanServerImpl.java:344) at org.jboss.system.ServiceCreator.install(ServiceCreator.java:157) ... 82 more Caused by: java.lang.ClassNotFoundException: No ClassLoaders found for: org.jboss.aop.JoinPoint at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:306) at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:521) at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) Can anybody give help on this? When I am using JBoss 4.0.3 comes along with the Mail Server, everyting works well. Thanks in advance! Kevin View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4248200#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...