Installed Membership Premium button but NO MENU on backend!

Hi there,

I am trying to create an online classroom with my wordpress 3.1 website (single not multi site). I have the BuddyPress scholar template installed on wordpress 3.1 I have also installed the membership premium plugin. However, there is no backend menu called "membership" as the screenshots show.

My goal is to create an online classroom and sign up students while charging them beforehand. Can this be done? If so, what am I doing wrong or not doing?