The lockout has ended and it finaly worked fine (but still with copy paste, when you have to register Panzer corp whith all the grand campaign dlc plus extensions, it's copy paste ...
Thank you

My product license key won't register on your server.
I've tried a few time and now its lockout.

The key should be ok since i've made a copy paste from the email i've recieved
when i bought the game :

Dear jean noel,

Thank you for your purchase of:

(1) - Panzer Corps - PC Digital

Your license ...