Hide a project

Hi,

I have some projects using a specific project type (named "internal"). For the exemple, let say "PROJECT A"
This PROJECT A is allocated to the "project manager" and assigned to some "project members" but i don't want this specific project to be viewed by the "project members". It's the "project manager" that do the real work allocation of all members.

So i try to hide PROJECT A using restrictions type applied to the "project member" profil : I select all types of project except "internal"
The global parameter "type restriction on project” is set to “Yes”

But "project member" still view PROJECT A
What do i do wrong ?

Thank you for your help.

Yann