Fields remain visible.

When a customer wants to reserve a room in our B&B he is required to fill in a customer profile. I have added a few fields to that customer profile and installed Fields Permissions to make these fields only viewable by Administrators. When I open another browser on my computer, one where I am an anonymous visitor on my site, these fields are still there. It doesnt matter if it is an older field (with contents in it) or a new empty field. I have cleared the cache, ran update.php, Cron and rebuild permissions, but anonymous visitors can still see the same fields as the administrator.