BuddyPress.org

Does not look like you’re using a BuddyPress compatible theme. The default TwentyTen theme is not BP compatible, out of the box.

Try making the your current, activated theme compatible with BuddyPress by using the BuddyPress Template Pack plugin:
https://wordpress.org/extend/plugins/bp-template-pack/

Or, create a child theme for BuddyPress:
https://codex.buddypress.org/theme-development/building-a-buddypress-child-theme/

Either way, your theme must be BP compatible in order to utilize the BP features.

Good luck!