How to make my buddypress installation private?

This is my Mu+Buddy installation:

http://massaludableonline.com/

What i want is to make all the site private, first page must be a login screen
if i set the privacy options to "only logged users", what i get its a blank screen, not the login one
:slight_frown:

Meybe i need this??
http://wordpress.org/extend/plugins/force-user-login/

Works ok with MU-buddy ?