web.xml authentication issues

[psalvadori]

Hi all,

(JBossPortal2.2 - JBoss-4.0.3SP1)
I have a boring problem since some days and I don't know how to solve it. The goal I want to reach is to have multiple instances of portal and every one must have his own authentication. My actual situation is that, if I log-in in one of my portal instances and after I open another instance I'm recognized as logged in new instance too. It is no good for me. I also need to have different login and error pages for every portal instance but what i wrote in web.xml of my portal instances is ignored every time and both login and error page are the same for every portal instance.

my config files are:

myportal/WEB-INF/web.xml

...

<security-constraint>
 <web-resource-collection>
 <web-resource-name>res-name</web-resource-name>
 <description></description>
 <url-pattern>/auth/portal/MyPortal/*</url-pattern>
 </web-resource-collection>
 <auth-constraint>
 <role-name>MyRole</role-name>
 </auth-constraint>
 </security-constraint>

 <login-config>
 <auth-method>FORM</auth-method>
 <form-login-config>
 <form-login-page>/mylogin.jsp</form-login-page>
 <form-error-page>/myerror.jsp</form-error-page>
 </form-login-config>
 </login-config>

...

myportal/WEB-INF/jboss-web.xml

<?xml version="1.0"?>
<jboss-web>
 <security-domain>java:jaas/myportal</security-domain>
</jboss-web>

myportal/WEB-INF/login.config.xml

<policy>
 <application-policy name="myportal">
 <authentication>
 <login-module code="mypackage.MyModelLoginModule" flag="required">
 <module-option name="unauthenticatedIdentity">guest</module-option>
 <module-option name="hashAlgorithm">MD5</module-option>
 <module-option name="hashEncoding">HEX</module-option>
 <module-option name="userModuleJNDIName">java:/portal/UserModule</module-option>
 <module-option name="additionalRole">Authenticated</module-option>
 <module-option name="password-stacking">useFirstPass</module-option>
 </login-module>
 </authentication>
 </application-policy>
</policy>

I hope someone can help me.
Thanks in advance,
Paolo.