OK thank you
For me it was not very simple to anderstand in the documentation...
7) Disable Joomla/Mambo login modules
Add new Public menu item to Community Builder component *** IMPORTANT ***
9) Add new User List menu item
For me, add a publi menu = for the public (not for registred users)
Maybe because I'm french...
OK I try your solution. I come back to say if it's good for me.
Thanks a lot