升级hotmail至250M空间以后

我发现10次中有9次我都无法登陆hotmail信箱了。错误提示如下：

The .NET Passport service is currently unavailable at this Web site for one of these reasons:

• The site may contain an error or be experiencing a problem that affects the .NET Passport service.
• The site may not be an official .NET Passport-participating site.

You can:

• Return to this site later and try to sign in or register again.
• Sign in or register for a .NET Passport at another .NET Passport participating site. .NET Passport Site Directory

这到底是怎么回事呢？请高手指点一二。先谢过了！