How to use viewPermission

["Davide Ficano" <davide.ficano@xxxxxx>]

I'm unable to correctly use viewPermission and editPermission.

Below my scenario.

I've a group with name 'intranet'.
This group is create at exo startup based on configuration into the 
users-configuration.xml file.

Now inside template-pages.xml I configure a page with permission as shown 
below:

  <page>
    <owner>@owner@</owner>
    <name>/home/sx/intranet/newsIntranet</name>
    
    <viewPermission group="/intranet" membership="owner"/>

    ...
    ...
    ...

This page must be visibile on when user is associated to 'intranet' group.

Now into template-navigation.xml I apply to nodes the same permission 

<viewPermission group="/intranet" membership="owner"/>

Finally
1. I create new user
2. I login using user created at step 1
3. I see the page belongs to 'intranet' group
   This must be visibile only when user is associated to 'intranet'

Where is my error?
Where can I found a clear and well documented way to handle permissions?

Sincery yours,
davide