CoursePress Pro and Woocommerce - Missing Buy button

I've tried to get CoursePress Pro working with Woocommerce, but I coulnd't get it to work.
This is the course-page:
http://onlinemarketing-lernen.de/courses/wie-ich-meine-mails-mit-outlook-in-den-griff-bekomme/
There is no buy button available... I assume because in the enrollment settings of the course this course is set to "registered users".
I would like to set it to anyone... but this settings is not available. There is only
- manually added only
- registered users
- registered users with passcode
- registered users who completed the..

Any idea how I can make it work?

BR
Martin