Activate Classified will make BuddyPress Front End Tool Bar not function


I have set up a test for trying out Classified plugin in WordPress 3.1 MS and BP 1.2.8 with BP Default Theme. And after I activated Classified, the BP Front End Tool Bar on the top of the screen will not show any drop down as it should to show additional info such as Activity and Profile under My Account.

The only plugins active are BuddyPress and Classified.

Please advise.