Moodle networking (MNet)

I have to sites, A and B both publishing and subscribed. I want members of B get enrolled to A courses. But only some...

In A i have 2 categories
-Local only courses
-Local+Network courses

I read that on wiki:

On both, go to Admin > Courses > Enrolment and enable Moodle Network enrolment plugin (click Save). Click on 'Edit' and enable 'allow_allcourses' or select some courses or categories to be remotely enrolled

And I choose to allow the Local+Network category.

But when a member of B visits A, I can see and can enrol into all of courses. What can be wrong? :S