URL Restrictions no longer protecting content !!

My protected content is no longer protected. I am protecting downloads in the form of PDFs (whitepapers). I am using the URL restrictions add-on only, vs. protecting Pages or Posts. I f I protect the post itself then the post excerpt will not show up in the Category (archive) list, which we want. We only want the protection to activate once the archive "Read more" link is clicked, so the user is prompted to register for (free) membership.

I have tried everything but nothing helps. I don't believe it's a plugin conflict as I've deactivated plugins to no avail. This is a critical matter as my client needs the whitepapers protected. The MailChimp integration add-on is also installed.

We are using Version