I've been running this server for 4 days now. There have been no problems at all. Today morning I found out I and my brother can't connect to the server anymore. Minecraft gives a long error. See the screenshot. My server.properties file: Code: #Minecraft server properties #Thu Nov 24 13:29:43 EST 2011 allow-nether=true level-name=OnLine allow-flight=true enable-query=false server-port=25565 enable-rcon=false level-seed= server-ip= white-list=false spawn-animals=true online-mode=true pvp=true difficulty=1 gamemode=0 max-players=12 spawn-monsters=true view-distance=10 motd=CryADsisAM's Server Error: Code: Internal client error: java.io.IOException: Server returned HTTP response code: 502 for URL: http://session.minecraft.net/game/joinserver.jsp?user=CryADsisAM&sessionId=-4858316175626431005&serverId=5fce9c25b1c21300 If I run server with online_mode set to false. It appears its working but I don't want it to be set to false. I need help quickly.