struts2 on jboss java.lang.NoClassDefFoundError: org/apache/struts2/util/ObjectFactoryDestroyable

Hello, can someone help me? When I undeploy or redeploy my web application based on struts2 on jboss 4.2.2 I have this error: 13:35:57,788 INFO [TomcatDeployer] undeploy, ctxPath=/PianificazioneWeb, warUrl=.../deploy/PianificazioneWeb.war/ 13:35:57,788 ERROR [BaseModelMBean] Exception invok

Re: struts2 on jboss java.lang.NoClassDefFoundError: org/apache/struts2/util/ObjectFactoryDestroyable

Thank you for answer, but I have struts2-core-2.0.9.jar in PianificazioneWeb.war/WEB-INF/lib where I also have these jars: struts2-jasperreports-plugin-2.0.9.jar struts2-tiles-plugin-2.0.9.jar tiles-api-2.0.4.jar tiles-core-2.0.4.jar tiles-jsp-2.0.4.jar xwork-2.0.4.jar commons-beanutils-1