ok, so i just downloaded the World of Minecraft client, i start up the client, log in, the srver list comes up, everything is fine. but when i click on a server and hit "Go", a window pops up that is pretty much blank except for a few tabs that say: "switch", "reload", "screenshot", and "dump level". anyone got any info on wats wrong and how to fix it? I cant even go on single player!