Hi! i made a new install wp 3.2.1 and bp 1.5 and i dont get how to enable blogs and sites.

[@r-a-y Keymaster 13 years, 6 months ago]

You need to create a WordPress network first before you can use BuddyPress’ blog tracking functionality.

Have you read this article?
https://codex.wordpress.org/Create_A_Network