There, My website

Hi There,
My website PROMOBUZZ.FR was added to my OLD WMPU account (chris@alienprod.fr) but Alien Prod firm is closed since 2013.
I have activate a new account with my new firm PROMOBUZZ SAS.
WPMU don't want to accept register PROMOBUZZ.FR and say : "This domain has previously been registered with WPMU DEV by the user alienprod(c***s@alienprod.fr). To use the dashboard plugin on this domain, you can either login with the original account (and upgrade it if necessary), or upgrade your trial to a full WPMU DEV membership."

I don't want to reactivate my old account ! I want to add PROMOBUZZ.FR to my new account service.client@promobuzz.com

Can you help me ?

Thanks
Christophe MARCY