[jboss-user] Resource configuration.

I am getting following error while configuring Resource in context.xml 19:15:05,515 ERROR [JBossContextConfig] XML error parsing: context.xml org.jboss.xb.binding.JBossXBException: Failed to parse source: Resource cannot appear in this position. Expected content of Context is unordered_sequence: Listener* Parameters* Valve* SessionCookie? Loader? Manager? Realm? attributes? InstanceListener* Resources? at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.parse(SaxJBossXBParser.java :203) at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.parse(SaxJBossXBParser.java :183) at org.jboss.xb.binding.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:133) at org.jboss.web.tomcat.service.deployers.JBossContextConfig.processContextConf ig(JBossContextConfig.java:573) at org.jboss.web.tomcat.service.deployers.JBossContextConfig.init(JBossContextC onfig.java:536) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java: 279) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSuppor t.java:117) at org.apache.catalina.core.StandardContext.init(StandardContext.java:5436) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4148)