Problème avec RichFaces

Salut tout le monde,
j'ai un petit problème au niveau du code:
voici la page web.xml:

Code:

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<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 
<display-name>Greeter</display-name>
<context-param>
   <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
   <param-value>server</param-value>
</context-param>
<context-param>
   <param-name>org.richfaces.SKIN</param-name>
   <param-value>blueSky</param-value>
</context-param>
<context-param>
    <param-name>org.richfaces.CONTROL_SKINNING</param-name>
    <param-value>enable</param-value>
</context-param>
<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>
<!-- Faces Servlet -->
<servlet>
   <servlet-name>Faces Servlet</servlet-name>
   <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
   <load-on-startup>1</load-on-startup>
</servlet>
<!-- Faces Servlet Mapping -->
<servlet-mapping>
   <servlet-name>Faces Servlet</servlet-name>
   <url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<login-config>
   <auth-method>BASIC</auth-method>
   </login-config>
   <welcome-file-list>
        <welcome-file>faces/index.jsp</welcome-file>
    </welcome-file-list>
    <security-constraint>
        <web-resource-collection>
            <web-resource-name>No-jsp-jsf</web-resource-name>
            <url-pattern>/index.jsp</url-pattern>
        </web-resource-collection>
    </security-constraint>
</web-app>

faces-config.xml:

Code:

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<!-- =========== FULL CONFIGURATION FILE ================================== -->
<?xml version="1.0" encoding="UTF-8"?>
<faces-config version="1.2" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">
   <managed-bean>
      <description>UsernName Bean</description>
      <managed-bean-name>user</managed-bean-name>
      <managed-bean-class>demo.user</managed-bean-class>
      <managed-bean-scope>request</managed-bean-scope>
      <managed-property>
         <property-name>name</property-name>
         <property-class>java.lang.String</property-class>
         <value/>
      </managed-property>
   </managed-bean>
</faces-config>

index.jsp :

Code:

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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<!-- RichFaces tag library declaration -->
<%@ taglib uri="http://richfaces.org/rich" prefix="rich" %>
<%@ taglib uri="http://richfaces.org/a4j" prefix="a4j" %>
<html>
      <head>
            <title>RichFaces Greeter</title>
      </head>
      <body>
            <f:view>
                  <a4j:form>
                        <rich:panel header="RichFaces Greeter" style="width: 315px">
                              <h:outputText value="Your name: " />
                              <h:inputText value="#{user.name}" >
                                    <f:validateLength minimum="1" maximum="30" />
                              </h:inputText>
                              <a4j:commandButton value="Get greeting" reRender="greeting" />
                              <h:panelGroup id="greeting" >
                                    <h:outputText value="Hello, " rendered="#{not empty user.name}" />
                                    <h:outputText value="#{user.name}" />
                                    <h:outputText value="!" rendered="#{not empty user.name}" />
                              </h:panelGroup>
                        </rich:panel>
                  </a4j:form>
            </f:view>
      </body>
</html>

À l'exécution une erreur se produit du type:
L'application pour le chemin de contexte /Greeter n'a pas pus être démarrée