Connecting to smp.opticraft.net, 25565
java.io.IOException: Server returned HTTP response code: 504 for URL:
http://session.minecraft.net/game/joinserver.jsp?user=iGenerator&sessionId=-4368466932747775028&serverId=391d5f62630bc7f7 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.URL.openStream(Unknown Source)
at adl.a(SourceFile:508)
at jf.a(SourceFile:29)
at lg.b(SourceFile:273)
at adl.b(SourceFile:90)
at ajy.a(SourceFile:45)
at net.minecraft.client.Minecraft.k(SourceFile:1384)
at net.minecraft.client.Minecraft.x(SourceFile:719)
at net.minecraft.client.Minecraft.run(SourceFile:671)
at java.lang.Thread.run(Unknown Source)