[jboss-user] [Tomcat, HTTPD, Servlets & JSP] - JSF1.2 can not work in jboss4.0 or jboss4.2 service

I don't know why it have exception when I deploy jsf1.2 web application to jboss4.0 or jboss4.2 1.when i deploy jsf web application to jboss4.2 service the exception is: 2008-03-07 13:17:03,937 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/kk]] Exception sending context initialized event to listener instance of class org.jboss.web.jsf.integration.config.JBossJSFConfigureListener java.lang.ClassCastException: com.sun.faces.application.ApplicationAssociate cannot be cast to com.sun.faces.application.ApplicationAssociate 2.when i deploy jsf web application to jboss4.0 service the exception is: 2008-03-07 13:14:10,531 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/testjsf].[jsp]] Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at javax.faces.webapp.UIComponentTag.setupResponseWriter(UIComponentTag.java:615) at javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:217) at org.apache.myfaces.taglib.core.ViewTag.doStartTag(ViewTag.java:71) 3.below is my /lib/ jar file: commons-beanutils.jar commons-collections.jar commons-digester.jar commons-logging.jar jsf-api.jar jsf-impl.jar jstl-1.2.jar servlet-api.jar 4.below is my web.xml: <servlet-name>Faces Servlet</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> <load-on-startup>1</load-on-startup> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>/faces/*</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>/faces/index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>/faces/default.jsp</welcome-file> </welcome-file-list> who help me solve the question ,Thank you very mach View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4134813#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...