Sign Up Light Box Does Not Appear for non logged in users on course details page

Issue 1:
The sign up light box does not appear on the course detail page.

If the user is not logged in, he can see the Sign Up button. However, click on the button only grays out the screen.

Question 2:
Can I disable the filters (Category & Order By) in the [mp_product_list] shotcode?

Question 3:
Can I create a page to display only free content (units) categorized by products.

Thanks and Regards,
Neelesh R Pednekar