Trying to content lock just one post in blog page

Hey, having problem with cpagrips content locking. I have blog page on my site where I am locking just one post. But the problem is that when you click on the blog in the menu the whole blog is locked. But when I click on the Popular Posts widget in the sidebar I can access the other posts too but not from the blog in the menu. Is there any way to fix this problem? Any ideas?