Group Calendar: members cannot create events

Members are unable to create events on their group calendar even though the group settings are set to allow members to create and edit their own events. Admin and Mod levels are able to create/edit events with no problem. I have tried reactivating and completely reinstalling the plugin to no avail. The public group, Test Group III, was created after the reinstall last night but is still not working properly for members. We are using WordPress MU 2.9.1 and BuddyPress Social Network Parent Theme 1.1.2. The blog is referralweb.net if you would like to take a look at it. Let me know if you want an admin account for troubleshooting.
Thanks,
Jeff