ADMIN BAR

I'm running a wordpress site with
- WP. 3.5
- Buddypress : Version 1.6.2
- Social theme ; Version 1.3.5.5
- activated Plugins list : below

The admin bar only appears in the adminstration interface but not on the front.

What should I do ?

Thank you,

THE PLUGIN LIST

Advanced Custom Fields

All In One Related Posts

BP Group Email

BP Group Hierarchy

BP Group Organizer

BuddyPress

BuddyPress Docs

BuddyPress Group Calendar

BuddyPress Group Skeleton Component

Buddypress Notifications Manager

BuddyPress Barre d'outils

Dave's WordPress Live Search

Friends

Kalin's PDF Creation Station

Live Stream Widget

Login Redirect

N-Media Repository Manager

Nmedia File Uploader Plugin

Post Forking

Private BuddyPress

RSS Multi Importer

Ultimate Branding

WP-Chatblazer

WP Document Revisions

WPMU DEV Dashboard