[Observium] Active Directory/SSO Issue

Hi,

I'm trying to configure SSO with active directory per instructions at http://docs.observium.org/authentication/#active-directory-with-sso?

But, once I enable "active_directory" in /opt/observium/config.php as the auth method. I got this error message on the browser :

This page isn't working

aaa.bbb.com redirected you too many times.

Try clearing your cookies.

ERR_TOO_MANY_REDIRECTS

Any pointers, clues ?

Thanks In Advance,

Tarkan