Gmail confusion

OK, got a new e-mail account and for some reason I can't register the new e-mail with this blog account. It's from the same source, google. What's up google? Does anyone know why or have answers to this puzzling question? I don't want to get a separate e-mail account simply for this blog but then again I don't want to lose this blog. I know there are far more difficult things in life but this one is bothering me at the moment. :-/