BuddyPress.org

I installed WordfPress, BuddyPress, bbPress, WP Multi Network and then unzipped BP Multi Network into mu-plugins. (I’m using all the latest non-beta versions). I set up WordPress Multisite along the way. I also Installed Group Forums, created one subsite and created BuddyPress component pages for the subsite. The Activity tab on the main site displays properly when I select it. However, the Activity tab on the subsite redirects to the Home tab when I select it. How do I fix this?