1) The password you are trying is wrong. Could the CAPS LOCK be on? Here is the Microsoft site where you can change your password. Refer to your registration documentation. Do you have a confirmation email with your email address and password?
2) Have you just changed or fiddled with your firewall? Could that be blocking your MSN connection?
3) I never like this solution, but sometimes it does the trick: Delete internet temporary files and cookies. Internet Explorer: Tools (menu), Internet Options.
Screenshot of Error Code 80048823
Summary of MSN Error Code 80048823
Double check your the email account for your username.
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