Flash Builder 4.7 : Cannot complete Licensing

Hello,

I'm owner of two Flash Builder 4.7 licenses, they are listed in my Adobe account, under Products and Services sections as

                            Flash Builder Std                   4.7                      multi

                            Flash Builder Prem                4.7                     multi

I recently formated my computer and installed back Flash Builder 4.7.

My problem is, if I click on "License this product" and enter any of my license key, I have the following error :

                          Serial Number you provided is valid, but a qualifying product could not be found on this computer.

I tried to install Flash Builder 4.6 instead, but it launch me the same error.

Could you help me please ?

Thanks a lot.