Impossible to install updates - CS6 - Windows 7

Hello,

I can't install updates for adobe design and webpremium CS6. Actual version : CS6 (8.0.1.406)

I tried this :

1/ Through the Help menu

2/ Manual updaters at :

Adobe - Digital Publishing Suite : For Windows

Adobe - DPS Desktop Tools : For Windows

Adobe - InDesign : For Windows

=> No problem to install updates on CS5.5,  but not on CS6

3/  In safe mode

What's happened when trying : I get any error message. The Adobe Application Manager window is  empty and when I try to update with the software a window opens with the following message "recherche de mises à jour..." or "checking for updates..." but nothing... I wait and wait...

Thank you for your help,