BuddyPress.org

hello, i am new in the wordpress/buddypress world, i installed a wordpress and it works, but i have problem with the buddypres when i activat that plugin i must go to permalink options to do something, but there is nothing i can change or something else here is a printscreen

http://img202.imageshack.us/i/buddyg.jpg/

What should i do?

Thanks for your support