Can't get the forums to work on Subdomain site

Hello

I have Buddypress installed on the primary domain. I am trying all the different options, but I can't get the forums to appear on the subdomain site. I can see it in superadmin, but not as an admin.

Do I need to install bbpress separately on the subdomain site? Is it that the forums in Buddypress only work on the primary domain?

Anyone have an idea what could be wrong?

Dustin