[Plugin: BuddyPress] Setup Problems

I’ve installed Budypress, and now i’ve a button log out but can not find the community and register options like on the template Mingle example:
http://themeforest.net/item/mingle-multipurpose-wordpress-theme/full_screen_preview/235056

i am a beginner and hopely somebody can help me setup this

Kind Regards,

Peter

http://wordpress.org/extend/plugins/buddypress/