How to autenticate using spring security and ldap with jsf

I'm creating application with spring security 3 using the protocole Ldap,and JSF 2 the problem is that I have always authentication failure ! I have a working java classe witch tests the existance of user in the ldap base:

public class Ldap   {
public static boolean test(String login,String pass) throws UnsupportedEncodingException    {
    boolean exist=false;
    Hashtable<String, String> env = new Hashtable();


    String Name = "CN="+login+",CN=USERS,DC=ABC,DC=COM";
    String Password = pass;
    String ldapURL = "ldap://192.168.6.42:389";
    env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
    //set security credentials, note using simple cleartext authentication
    env.put(Context.SECURITY_AUTHENTICATION,"simple");
    env.put(Context.SECURITY_PRINCIPAL,Name);
    env.put(Context.SECURITY_CREDENTIALS,Password);

    //connect to my domain controller
    env.put(Context.PROVIDER_URL,ldapURL);


    try {

        //Create the initial directory context
        LdapContext ctx = new InitialLdapContext(env,null);

        //Create the search controls        
        SearchControls searchCtls = new SearchControls();

        //Specify the search scope
        searchCtls.setSearchScope(SearchControls.SUBTREE_SCOPE);

        //specify the LDAP search filter
        String searchFilter = "(&(objectClass=user)(CN="+login+"))";

        //Specify the Base for the search
        String searchBase = "CN=Users,DC=ABC,DC=COM";

        //initialize counter to total the group members
        int totalResults = 0;

        //Specify the attributes to return
        String returnedAtts[]={"memberOf"};
        searchCtls.setReturningAttributes(returnedAtts);

        //Search for objects using the filter
        NamingEnumeration answer = ctx.search(searchBase, searchFilter, searchCtls);


        //Loop through the search results
        while (answer.hasMoreElements()) {
            SearchResult sr = (SearchResult)answer.next();



            //Print out the groups

            Attributes attrs = sr.getAttributes();
            if (attrs != null) {
                exist=true;


            }
        }
      ctx.close();

    } 

    catch (NamingException e) {

        }
    return exist;
}
 }

but my spring-security configuration doesn't work :

 <http use-expressions="true" >
 <intercept-url pattern="/pages/ADM/**" access="hasRole('ROLE_ADM')" />
<intercept-url pattern="/pages/Employe/**" access="hasRole('ROLE_EMP')" />
 <!-- Custom login page -->
    <form-login login-page="/login.jsf"  authentication-success-handler-  ref="loginSuccessHandler"
  authentication-failure-handler-ref="loginFailureHandler" />

 <!-- Custom logout page -->
  <logout />
  </http>
  <beans:bean  id="loginSuccessHandler" class="exp.customloginpage.AuthSuccessHandler" />
 <beans:bean id="loginFailureHandler" class="exp.customloginpage.AuthFailureHandler" />
  <!-- Use authentication provider. -->
  <beans:bean id="contextSource"  class="org.springframework.security.ldap.DefaultSpringSecurityContextSource">
     <beans:constructor-arg index="0"  value="ldap://192.168.6.42:389/cn=Users,dc=ABC,dc=COM" />
  </beans:bean>
  <beans:bean id="ldapUserSearch"  class="org.springframework.security.ldap.search.FilterBasedLdapUserSearch">

 <beans:constructor-arg index="0" value=""/>
 <beans:constructor-arg index="1" value="(uid={0})"/>
 <beans:constructor-arg index="2" ref="contextSource" />
 <beans:property name="searchSubtree" value="true" /> <!-- Recherche dans les     sous-branches -->
 </beans:bean>

 <beans:bean id="userDetailsAuthoritiesPopulator"   class="exp.customloginpage.UserDetailsAuthoritiesPopulator" />
 <beans:bean id="ldapAuthProvider"    class="org.springframework.security.ldap.authentication.LdapAuthenticationProvider">
  <beans:constructor-arg index="0">
  <beans:bean class="org.springframework.security.ldap.authentication.BindAuthenticator">
    <beans:constructor-arg index="0" ref="contextSource" />
    <beans:property name="userSearch" ref="ldapUserSearch" />
 </beans:bean>
 </beans:constructor-arg>
 <beans:constructor-arg index="1">
    <beans:bean      class="exp.customloginpage.UserDetailsAuthoritiesPopulator" />
 </beans:constructor-arg>
 </beans:bean>

 <authentication-manager>
<authentication-provider   ref="ldapAuthProvider" />
</authentication-manager>