No, I'm talking about your Disneymovierewards account. I read in a discussion board on Facebook that a user put a code that was 3 weeks old and it locked up their Disneymovierewards account.
I've entered TONS of codes, from movies that are much older than 3 weeks and I've never had any issues. Maybe it was because they hadn't used their account in a while, or some other issue. But probably not from the code...