The email ID here in forum has one CC registered to it which has expired, there is no other CC, of you trying to launch the CC with this Email ID then it will ask for serial number.
Since you have CC for Team to this same Email ID, you need to log out & log back in of the Cc desktop app to activate the CC for Team though the activation server shows that the CC for Teams have been activated once on September 25th 2014.
http://helpx.adobe.com/creative-cloud/kb/sign-in-out-creative-cloud-desktop-app.html
Regards
Rajshree