loginSuccessful observer - where should it be located?

[chris.simons]

All,

I have the following @Observer method:

 
 /** the logged in user **/
    @In
    User currentUser;
//......
@Observer("org.jboss.seam.security.loginSuccessful")
    public void updateUserStats()
    {
         Integer logins;
         
         currentUser.setLastLoginDate(new Date());
         
         logins = currentUser.getLoginCount() + 1;
         
         currentUser.setLoginCount(logins);
         
    }

I have tried having this in my AuthenticatorAction component itself - this failed; Seam said the scope of the bean calling this action must be in Session scope.  So, I then tried putting it into a Session scoped, Stateful bean, and now I'm getting an NPE.

Does anyone have any advice?  The example in Chapter 15 seems so simple yet I'm having a lot of trouble getting it to work.  I'm running Seam 2.1.SP1, by the way.

Thank you.