Activity steam's links are dead.

I'm running BP 1.5.3.1, and WP 3.3.1, and BP-Social's latest edition.

My user's activity streams each produce a link obviously, but they are all dead. For example, if I have a status update, if I click on its time stamp which is its link (or if its my latest status update which appears right next to my avatar with a "view" button that is its link), I see at the bottom of my browser that the link points to http://www.domainname.com/activity/p/### where ### is a number.

If I click on that link it takes me to a "page not found" link.

I've tried disabling all plugins and this is still happening. any idea why?