Usuario da Rede

E ai galera…

É o seguinte:

Tenho uma aplicação Web que autentica um usuario via Active Directory, de modo BASIC.
Configurei minha aplicação com o WebLogic, de forma que fosse efetuado o login tipo BASIC.

configurei no meu Web.xml o seguinte:

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
  PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
  "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>
  <display-name>SCA</display-name>
  
  <listener>
	<listener-class>br.com.triad.sca.listener.StartContextListener</listener-class>
  </listener>
  
  <listener>
	<listener-class>br.com.triad.sca.listener.LogonServletContextListener</listener-class>
  </listener>
    
  <!-- Standard Action Servlet Configuration (with debugging) -->
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>2</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>

  <!-- Standard Action Servlet Mapping -->
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
 
  <session-config>   
    <session-timeout>30</session-timeout>  
  </session-config> 

  
  <!-- The Usual Welcome File List -->
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>



  <!-- Struts Tag Library Descriptors -->
  <taglib>
    <taglib-uri>/tags/struts-bean</taglib-uri>
    <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
  </taglib>

  <taglib>
    <taglib-uri>/tags/struts-html</taglib-uri>
    <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
  </taglib>

  <taglib>
    <taglib-uri>/tags/struts-logic</taglib-uri>
    <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
  </taglib>

  <taglib>
    <taglib-uri>/tags/struts-nested</taglib-uri>
    <taglib-location>/WEB-INF/struts-nested.tld</taglib-location>
  </taglib>

  <taglib>
    <taglib-uri>/tags/struts-tiles</taglib-uri>
    <taglib-location>/WEB-INF/struts-tiles.tld</taglib-location>
  </taglib>
  
  <!-- DisplayTag library Descriptors -->
  <taglib>
    <taglib-uri>/tags/displaytag</taglib-uri>
    <taglib-location>/WEB-INF/displaytag.tld</taglib-location>
  </taglib>

  <!-- Triad tag library Descriptors -->
  <taglib>
    <taglib-uri>/tags/triad</taglib-uri>
    <taglib-location>/WEB-INF/triad-tags.tld</taglib-location>
  </taglib>

  <!-- Data Source -->
  <resource-ref>
  	<description>Data Source do SCA</description>
 	<res-ref-name>jdbc/scaDS</res-ref-name>
 	<res-type>javax.sql.DataSource</res-type>
 	<res-auth>Container</res-auth>
  </resource-ref>
   
  <security-constraint>
		<web-resource-collection>
			<web-resource-name>Declarative Security Test</web-resource-name> 
			<url-pattern>/*</url-pattern>
			<http-method>POST</http-method>
			<http-method>GET</http-method>
		</web-resource-collection>
		<auth-constraint>
			<description>somente o grupo tomcat</description>
			<role-name>GrupoUsuario</role-name>
		</auth-constraint>
  </security-constraint>
    
  <login-config>
    <auth-method>BASIC</auth-method>
    <realm-name>default</realm-name>
  </login-config> 
  
  <security-role>
  	<description>Libera grupo usuario Admin do Role Tomcat</description>
  	<role-name>GrupoUsuario</role-name>
  </security-role>
     
</web-app>

configurei um arquivo weblogic.xml

<!DOCTYPE weblogic-web-app PUBLIC "-//BEA Systems, Inc.//DTD Web Application 8.1//EN" 
		"http://www.bea.com/servers/wls810/dtd/weblogic 810-web-jar.dtd">
		
<weblogic-web-app>     
	<security-role-assignment>         
		<role-name>GrupoUsuario</role-name>         
		<principal-name>UsuarioGCOB</principal-name>     
	</security-role-assignment>
</weblogic-web-app>

configurei meu WebLogic Server corretamente, comprovei isso pq consegui fazer a autenticação na tela BASIC do Browser…

Meu problema esta quando tento dar um request.getUserPrincipal() ou o request.getRemoteUser() e me retorna null sendo que deveria retornar o login do usuario que foi autenticado na tela BASIC do browser…

Alguem sabe o pq disse, sendo que configurei meus arquivos corretamente…? eu acho