SSL Issues

I cannot seem to make this plugin work as needed. I'm trying to protect a shopping cart site where certain member levels can only see certain categories. My issue lies in the fact that http pages and https pages are not being protected/displayed in the same way... i.e. the same URL with the https prefix will display protected content though it is blocked on the http, and sometimes vise-versa.

I don't see any settings or instructions that addresses this issue. Any solutions for this? Need a rapid reply or I'm going to have to give up on using this one as launch date is rapidly approaching. Thanks!