JAAS - security - Error page

[alan kent]

I am using jboss-3.2.1_tomcat-4.1.24 and I am using JAAS authentication
In web-xml, when an user is not authorized to access some page, I am using the following code

<web-app>
...
<error-page>
<error-code>403</error-code>
<location>/NotAuthorized.jsp</location>
</error-page>
...
</web-app>

But the problem is that it doesn't work because it still shows the default error page. It should redirect to the page "NotAutorized.jsp". Does somebody know if it works in tomcat ??? Or is there another way to override the custom error page ???