[Plugin: Restrict Content] Plugin Not Working

I’ve tried installing this plugin and restricting content on pages and posts. Then when I logout, I’m still able to see the content that I’ve restricted. Any idea why this is happening?

http://wordpress.org/extend/plugins/restrict-content/