This is something they've been working on. I don't have an ETA, but I'll check in soon. Just as an FYI, you should stop trying. There have been some previous issues with changing emails such as account duplication and account invalidation.
I am one of those people Foxhound-Pro has mentioned.
I decided to change my email and password for my CoD account here for security reasons.. When I did so, I lost my forum profile. I still have my Xbox gamertag and profile information correct. Just cant post or reply to threads.