BuddyPress.org

wp version = 3.6.1
buddypresss version = 1.9.2
buddypress user account type pro version = 1.1.3

i have two user types (mentor and mentee)on my system with default role of subscriber for both and default user type as mentee. Every time a new user wants to register as mentor it refuses to recognise and requests them to register by selecting form values for mentee.

But upon approval of their account the correct email of mentor is sent out to the user.

What could be the problem?

here is my website url, http://ementoring.youthbanner.org/

thanks