refreshing the display of a portlet

Hello,

I am using Jahia as a portlet container with a portlet in which 2 roles are
defined: depending on those roles (let's say a manager and a user role), an
entry servlet display one welcome page or another.
These roles are mapped with two user groups in Jahia. I want the following
behavior : 

	- when I authenticate under the manager role, I have to see the
manager page
	- when I authenticate under the user role, I have to see the normal
user page

When I first authenticate under the user group, logout and log under the
manager group, the display of the portlet is not refresh ! I have to click
on the edit tab to force the reloading of the correct page. Or when I
logout, if the user guest is in the user role, the reolading of the correct
page is ok.

Do you know a mean to be sure a portlet is refresh whenever a user change so
Jahia can display the correct page to him  - like when we switch in Edit
mode - ?

Thanks,

and best wishes for Christmas and the new year !

Dominique Pellat