Why can’t I access my msn account after outlook was automatically undated?

MSN email was updated to outlook.  Now I can't access my account and I'm not receiving any of my emails.  I go to the msn home screen and click on "sign in" and it doesn't do anything.  I'm now using my new Windows 8 computer if that makes a difference.  I have a lot of accounts tied to this email address and not being able to access the account or receive my emails is a major problem.