i've got the same problem i've tried it with http and https, but nothing works
/edit ok, now it works with http! but first, i've cleared my java cache (start > control panel > java > 'temporary internet files' > 'settings' > 'delete files' )
If it doesn't work one day, it's bound to work the other day.
I think maybe the server gets flooded every now and then, or just too many people are trying to connect at the same time. anyhow, right now i just can't connect to the server itself :/