I need to configure tomcat to prompt a basic authentication dialogue and authenticate users against the Active Directory. I could get the dialogue but after entering the valid userid and password I get the "authentication failed" messages.

Please guide me on how to resolve the issue?

Here are the steps that I followed.
1. Copied JNDI.jar and ldap.jar to tomcat/server/lib folder
2. In the server.xml file added following,

<Realm name="test" className="org.apache.catalina.realm.JNDIRealm" debug="99"
     connectionURL="ldap://agni:389"
     userBase="CN=Users,dc=company,dc=com"
     userSearch="(userPrincipalName={0})"
     userRoleName="member"
     roleBase="CN=Users,dc=company,dc=com"
     roleName="cn"
     roleSearch="(member={0})"
connectionName="CN=Administrator,CN=Users,DC=compa ny,DC=com"
     connectionPassword="adminpass"
     roleSubtree="true"
     userSubtree="true" />

[Here for 'company' I used my company's domain]

3. In Web.xml file I added
    <security-constraint>
        <web-resource-collection>
            <web-resource-name>
                Entire Application
            </web-resource-name>
            <url-pattern>/*</url-pattern>
        </web-resource-collection>
        <auth-constraint>
            <role-name>manager</role-name>
        </auth-constraint>
    </security-constraint>

    <login-config>
        <auth-method>BASIC</auth-method>
        <realm-name>test</realm-name>
    </login-config>

4. Restarted tomcat

System: Windows 2000,tomcat 4.1.24, jdk1.4.1