That would actually return an "incorrect user id or password" message though, rather than just hanging there!
i must be thick? Seriously sometimes msn does this just re-bbot it and should kick up ok, mines working fine so might be just your connection somewhere down the line.
If you are at work this might not be possible, but if you are at home, access it through MSN Messenger maybe? Thats how I always access mine and it rarely fails.