Q&A : Roles, bbpress forums, Participant instead of Subscriber

I have bbpress installed and now all my new members are defaulting to 'Participant' both as their wordpress role and as their forum role.

When I go into the q&a plugin settings and try to grand permissions for the bbpress roles such as participant, moderator, spectator, keymaster - the settings do not save! So when someone logs into their account (as a participant) they can't see the q&a section because they have no permissions for it.

There are two issues here:
1. Why are my wordpress user roles defaulting to participant when they should default to subscriber?? I have bbpress, buddypress, and a network setup installed.

2. How can I define user permissions in the q&a plugin for the bbpress user roles?

Thank you very much.
Leah