Not sure if your company is a member or if you have already registered in the past?
We can check that here for you too.
You can get a guest account
with limited functionality even if your company is not a member of MEF. You still have to be working in the mobile/media/technology business.
MEF is a community of professionals, so
use your company email
. Personal email are not accepted for registrations ( e.g. gmail, yahoo account)