Then put that information in the edit email and password part of the control panel instead of banning a user who finds out after he does something as innocuous as changing his or her email address!!!!!
Or read all the fine print on a site before !!!!! their methods
Also it is an option on vBulletin.com to have access here, so you need to check your account or the primary account holder to confirm your email was added. Sometimes it takes more than one error, grab a beer and come back later.