What should I use to do some post-authentication things (like loading user-preferences)

I tried to add an interceptor on both loginSuccessful and postAuthenticate.
Only on postAuthenticate the interceptor works.
Seam 2.0.2.
Interceptor class:

@Name(value = "preferenceController")

public class PreferenceController {
     @In
     Identity identity;

     @In(create = true)
     private EntityManager entityManager;

     @In(value = "user")
     private User user;

     @Observer("org.jboss.seam.security.loginSuccessful")
     public void doe()
     {
          System.out.println("This will not be shown");
     }
     @Observer("org.jboss.seam.postAuthenticate")
     
     public void getPreferences() {

          System.out.println("This is shown");
     }
}

Thank you for advice.