Problem "java.lang.NoClassDefFoundError: javax/el/ELResolver"

[Guto]

Hi,

When I run tomcat this problem happens.
Could you help me?
Thanks


Guto



SEVERE: Exception sending context initialized event to listener instance 
of class org.apache.myfaces.webapp.StartupServletContextListener
java.lang.NoClassDefFoundError: javax/el/ELResolver

These are my tomcat library:

   * commons-el
   * jasper-compiler-jdt
   * jasper-compiler
   * jasper-runtime
   * jsp-api
   * naming-factory-dbcp
   * naming-factory
   * naming-resources
   * servlet-api

These are my MyFaces library:

   * commons-beanutils-1.7.0
   * commons-codec-1.3
   * commons-collections-3.2
   * commons-digester-1.8
   * commons-discovery-0.4
   * commons-logging-1.1
   * myfaces-api-1.2.0
   * myfaces-impl-1.2.0
   * tomahawk-1.1.6

Tomcat version: 5.5.12