Securing a site

Hi

I have a site where I want to secure most catagories.

The site is http://baby.gjesager.dk
The public catagories are: “Admin” and “Dagens billede”

I’m using the “Category Visibility” plugin (http://ryowebsite.com/?p=46) and it works fine, Except for one thing.

If I go directly to a locked category or post like this: http://baby.gjesager.dk/?cat=12 there is no longer any security on the site and all categories are open to the web.

Is there anyway to solve this problem?
Is there anyway to secure WP categories and the posts within?

In addition I’m using:
Role Manager: http://redalt.com/wiki/Role+Manager
Themed Login and Register: http://www.jameskelly.org/wordpress-plugins/custom-login-and-registration-forms-plugin/

J;-)