Reset the configuration for MSN connection:
1. Sign out of MSN
2. Open MSN but do not sign in
3. Press CTRL SHIFT and F11 together. When done correctly, you'll get a pop up for removing account
4. Proceed to remove account
5. Start MSN again and enter the needed information.
That should fix this issue. In the rare case that it does not. Please reply to this post and include details of the concern.