Associated Roles with Access levels


I am struggling to make sense of Access levels. They just don't seem to be doing what I want.
I have events+ plugin also installed. What I want is for members of say level 2, to be able to add/ edit an event while level 1 are unable to. I can't seem to get this work.

Was going to assign a associated role and edit this through another plugin: User Role Editor. But I need to associate different roles to different access levels, which I can't seem to do?

Any help would be greatly appreciated.