javax.servlet.ServletException

[Yas El]

I have a problem and I don't know how to fix it

exception 

javax.servlet.ServletException: 
	org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
	org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
	org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
	org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)


cause mère 

java.lang.NoClassDefFoundError: org/richfaces/context/PartialViewContextImpl
	org.ajax4jsf.application.AjaxStateManager.writeState(AjaxStateManager.java:70)
	com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:605)
	org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
	org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
	com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
	com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
	com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
	javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
	org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
	org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
	org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
	org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)

In my WEB-INF\lib:

jstl.jar
jsf-impl.jar
jsf-api.jar
jsf-facelets-1.1.13.jar
richfaces-ui-3.3.3.Final.jar
richfaces-api-3.3.3.Final.jar
richfaces-impl-jsf2-3.3.3.Final.jar
jhighlight-1.0.jar
commons-logging-1.0.4.jar
commons-digester-1.8.jar
commons-collections-3.2.jar
commons-beanutils-1.7.0.jar

My web.xml :

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>JSFFaceletsTutorial</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>/faces/*</url-pattern>
  </servlet-mapping>
  <context-param>
    <description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
    <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
    <param-value>client</param-value>
  </context-param>
  <context-param>
    <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
    <param-value>resources.application</param-value>
  </context-param>
  <!-- RICHEFACES -->
 
   <context-param>
    <param-name>org.richfaces.CONTROL_SKINNING</param-name>
    <param-value>enable</param-value>
  </context-param>
  
  <context-param>
	  <param-name>org.ajax4jsf.VIEW_HANDLERS</param-name>
	  <param-value>com.sun.facelets.FaceletViewHandler</param-value>
  </context-param>
  
  <context-param>
    <param-name>org.richfaces.CONTROL_SKINNING_CLASSES</param-name>
    <param-value>disable</param-value>
  </context-param>
<!-- Defining and mapping the RichFaces filter -->

  <filter>
	  <display-name>RichFaces Filter</display-name>
	  <filter-name>richfaces</filter-name>
	  <filter-class>org.ajax4jsf.Filter</filter-class>
  </filter>
<filter-mapping>
  <filter-name>richfaces</filter-name>
  <servlet-name>Faces Servlet</servlet-name>
  <dispatcher>REQUEST</dispatcher>
  <dispatcher>FORWARD</dispatcher>
  <dispatcher>INCLUDE</dispatcher>
</filter-mapping>
  <listener>
    <listener-class>com.sun.faces.config.ConfigureListener</listener-class>
  </listener>
</web-app>

Tahnk you !