Problème Spring securité

Salut tous le monde
Je suis entrain de développer une application web à base de J2EE ( intégration des Frameworks JSF SPRING et Hibernate ) , je développe actuelement la sécurisation des URL par Spring Sécurité , je présente ainsi la configuration des fichier web.xml et ApplicationContextSecurité.xml

pour web.xml j'ai ajouter les lignes suivantes pour charger Spring securité

<context-param>
<param-name>ContextConfigLocation</param-name>
<param-value>
/WEB-INF/applicationContextSecurity.xml
</param-value>
</context-param>

<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>
org.springframework.web.filter.DelegatingFilterProxy
</filter-class>
</filter>

<filter>
<filter-name>encoding-filter</filter-name>
<filter-class>
org.springframework.web.filter.CharacterEncodingFilter
</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>encoding-filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

comme j'ai créer un autre fichier applicationContextSecurity au niveau duquel j'ai securiser cetraines URl comme suit

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:security="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schem...-beans-2.5.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-2.0.xsd">
<security:global-method-security secured-annotations="enabled" />

<security:http auto-config="true">
<!-- Restrict URLs based on role -->
<security:intercept-url pattern="/Etude_Sensibilite.faces" access="ROLE_ADMIN"/>
<security:intercept-url pattern="/CAS.faces" access="ROLE_ADMIN"/>
<security:intercept-url pattern="/**" access="ROLE_USER"/>
</security:http>

<security:authentication-provider>
<security:user-service>
<security:user name="kelhaddad" password="aaa" authorities="ROLE_USER" />
</security:user-service>
</security:authentication-provider>

</beans>

cependant en déployant mon application je rencontre toujours l'erreur suivante :

GRAVE: Exception au démarrage du filtre springSecurityFilterChain
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'springSecurityFilterChain' is defined
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:387)
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:968)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:246)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:168)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:885)
at org.springframework.web.filter.DelegatingFilterProxy.initDelegate(DelegatingFilterProxy.java:216)
at org.springframework.web.filter.DelegatingFilterProxy.initFilterBean(DelegatingFilterProxy.java:145)
at org.springframework.web.filter.GenericFilterBean.init(GenericFilterBean.java:179)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3696)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4343)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
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:566)
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:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
22 nov. 2010 16:35:43 org.apache.catalina.core.StandardContext start


Je vous prie de m'aider si possible dans le plus cours delai c'est très urgent

Merci d'avance