How can I deactivate an email address and use a new id?

I have been having many problems with ade for the past month after many successful, problem-free years so decided to start all over again and registered with a new email address.  Now I can't get rid of the old id and it says the computer is authorized but when I try to "erase computer activation" I get the message: "Unable to Erase Authorization.  Please try after some time."  That message has been consistent for several days!  Help!!!