can't login MSN

I have a MSN account for serveral years ago. Every time I login its HOTMAIL, MESSENGER and SPACES, I save my ID in my computer, and type my password correctly, I even save my passwrod on MESSENGER. Since last Friday, I've used the same way to login MSN, but there have been a window said my account and password are not exist or incorrect. What should I do? Please tell me in Chinese. Thanks.