AshyDragon: Report posts only if you see something that needs to be removed from the forum, or requires a moderator's attention. Not when you need technical help please.
Could it be that someone had a similar email address, made a typo during their registration, realized it, and then abandoned that account? In either case, try registering with another email address. It's not used for anything except your login username, so it really doesn't matter what it is - you don't need to keep track of it. You'll need to verify it after registration (make sure that verification email doesn't end up in your spam box), but after that you can leave it alone.