Custom redirection page by role

Hello
I have set a page “restricted content” to inform people that some page are restricted to registered users.
This page shows a message “This page is restricted to registered users” with a login form.
I have also registered user with a custom role ‘vip”.
For some page, I have restricted page for “vip” role.
When user is registered but his role is “subscriber” he will not see the content but the message on the restricted content page is not OK since user is registered but he can’t see the page. SO I was was wondering how to customize message on the “restricted content” page?
Any idea would be really appreciated.