Problem with plugin “Post Levels”

You can see this good plugin on http://codex.ww.wp.xz.cn/Plugins/Restriction .

But when you write a post (whitch has assigned a Post level) and assign this post to new category, you can’t see this category in the category place, where are the other category. I mean that you can’t see the category there if you are loggined in and you have the law to see the post.

Don’t you someone know, how can I do:
After logging in, I’ll see the post and the category (in the category place) whitch is assigned to this post.

I thank you for every help…