小弟的Tomcat 启动时出现了下面的问题，哪位哥哥姐姐帮俺解决一下？快愁死了

严重: Exception sending context initialized event to listener instance of class com.sun.faces.config.ConfigureListener
java.lang.AbstractMethodError: javax.servlet.jsp.JspFactory.getJspApplicationContext(Ljavax/servlet/ServletContext;)Ljavax/servlet/jsp/JspApplicationContext;
 at com.sun.faces.config.ConfigureListener.registerELResolverAndListenerWithJsp(ConfigureListener.java:1610)
 at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:453)
 at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3729)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4187)
 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
 at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:809)
 at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:698)
 at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:472)
 at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122)
 at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310)
 at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021)
 at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
 at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
 at org.apache.catalina.core.StandardService.start(StandardService.java:450)
 at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
 at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
 at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
2011-2-22 20:38:34 org.apache.catalina.core.StandardContext start
严重: Error listenerStart
2011-2-22 20:38:34 org.apache.catalina.core.StandardContext start
严重: Context [/news] startup failed due to previous errors
ContextListener: attributeAdded('com.sun.faces.config.WebConfiguration', 'com.sun.faces.config.WebConfiguration@17c50b9')
2011-2-22 20:38:36 org.apache.catalina.core.ApplicationContext log