Installation failed again with the same result. I re-downloaded JBoss AS 4.2.1.GA to make sure it's the right one, downloaded http://www.jboss.org/downloading/?projectId=jbossws&url=/jbossws/down... , modified ant.properties, run "ant deploy-jboss421" and got errors as before. It starts with: 2008-04-23 09:40:44,725 DEBUG [org.jboss.kernel.KernelFactory] Completed JBoss Kernel construction. Duration: 14 milliseconds | 2008-04-23 09:40:44,741 ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] Error installing to Described: name=WSServerConfig state=Not Installed mode=Manual requiredState=Create | java.lang.NoClassDefFoundError: org/jboss/wsf/common/management/AbstractServerConfigMBean and ends with: | 09:41:00,497 ERROR [MainDeployer] Could not create deployment: file:/home/joshua/java/jboss-4.2.1.GA/server/default/deploy/jbossws.sar/ | org.jboss.deployment.DeploymentException: No ClassLoaders found for: org.jboss.wsf.container.jboss42.DeployerInterceptorJSE; - nested throwable: (java.lang.ClassNotFoundException: No ClassLoaders found for: org.jboss.wsf.container.jboss42.DeployerInterceptorJSE) I'm using Ubuntu 7.10 (x86, 32 bit) with Java 1.5.0_15 from Sun. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4146065#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...