Problema ao iniciar tomcat

Criei uma aplicação web no eclipse e apontei para rodar no meu tomact instalado e esta lançando o erro abaixo:
O que pode estar faltando? a lib já esta no projeto com a classe e no tomcat.

Alguma idéia.


SEVERE: Error configuring application listener of class com.sun.faces.config.ConfigureListener
java.lang.NoClassDefFoundError: org/apache/log4j/Layout
	at org.apache.commons.logging.impl.Log4jFactory.getInstance(Log4jFactory.java:140)
	at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:257)
	at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:390)
	at com.sun.faces.config.ConfigureListener.<clinit>(ConfigureListener.java:192)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at java.lang.Class.newInstance0(Unknown Source)
	at java.lang.Class.newInstance(Unknown Source)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3787)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
	at org.apache.catalina.core.StandardService.start(StandardService.java:516)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Layout
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at sun.misc.Launcher$ExtClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClassInternal(Unknown Source)
	... 25 more
30/04/2010 11:55:36 org.apache.catalina.core.StandardContext listenerStart
SEVERE: Skipped installing application listeners due to previous error(s)
30/04/2010 11:55:36 org.apache.catalina.core.StandardContext start

VErifica se vc está usando as libs do tomcat no seu classpath

não estou não:

tem que configurar?
Como?