Sorry if you are having trouble logging into the server. Minecraft.net central session servers are having an issue with authenticating players (this happens from time to time).
Also one way to check that it is Minecraft and not the Empire that is having problems is by trying a different server, or hitting this URL: http://session.minecraft.net/ that is the URL that the servers use for authentication.
Yup, it's not just you. Everyone's having issues right now. Hopefully they fix these kind of problems after they do their official launch.
http://www.minecraftforum.net/topic...th-server-down-the-one-topicto-rule-them-all/ have you tired this to see if this will work for the server?
Solo Minecraft doesn't use Minecraft.net authentication like multiplayer does. It's nothing that can be "fixed" on your or our end, we just have to wait for Minecraft.net to fix their issues.
OOOOHHHHH ok, im not as good at computers as many other people are so.... anyway, I HOPE THEY FIX IT SOON, i was playing on minecraft multiplayer just fine a few days ago, but now... i dont know.