Crash Error

2013-03-18 14:16:44 [INFO] [STDOUT] setupTexture: "/gui/background.png", id: 355
2013-03-18 14:16:44 [INFO] [STDOUT] setupTexture: "/gui/icons.png", id: 356
2013-03-18 14:16:47 [INFO] [STDOUT] Connecting to play.agionserver.eu, 25565
2013-03-18 14:16:49 [WARNING] [ForgeModLoader] [Mystcraft] PacketHandler: Failed to handle packet type 10
2013-03-18 14:16:49 [WARNING] [ForgeModLoader] [Mystcraft] Failed to register dimension for id 7, One is already registered
2013-03-18 14:16:49 [INFO] [STDERR] java.lang.IllegalArgumentException: Failed to register dimension for id 7, One is already registered
2013-03-18 14:16:49 [INFO] [STDERR] at net.minecraftforge.common.DimensionManager.registerDimension(DimensionManager.java:125)
2013-03-18 14:16:49 [INFO] [STDERR] at com.xcompwiz.mystcraft.network.MPacketDimensions.registerDimensions(MPacketDimensions.java:41)
2013-03-18 14:16:49 [INFO] [STDERR] at com.xcompwiz.mystcraft.network.MPacketDimensions.handle(MPacketDimensions.java:30)
2013-03-18 14:16:49 [INFO] [STDERR] at com.xcompwiz.mystcraft.network.MystcraftPacketHandler.onPacketData(MystcraftPacketHandler.java:45)
2013-03-18 14:16:49 [INFO] [STDERR] at cpw.mods.fml.common.network.NetworkRegistry.handlePacket(NetworkRegistry.java:243)
2013-03-18 14:16:49 [INFO] [STDERR] at cpw.mods.fml.common.network.NetworkRegistry.handleCustomPacket(NetworkRegistry.java:233)
2013-03-18 14:16:49 [INFO] [STDERR] at cpw.mods.fml.common.network.FMLNetworkHandler.handlePacket250Packet(FMLNetworkHandler.java:71)
2013-03-18 14:16:49 [INFO] [STDERR] at ayh.a(NetClientHandler.java:1483)
2013-03-18 14:16:49 [INFO] [STDERR] at di.a(SourceFile:59)
2013-03-18 14:16:49 [INFO] [STDERR] at cg.b(TcpConnection.java:458)
2013-03-18 14:16:49 [INFO] [STDERR] at ayh.d(NetClientHandler.java:240)
2013-03-18 14:16:49 [INFO] [STDERR] at ayk.c(GuiConnecting.java:49)
2013-03-18 14:16:49 [INFO] [STDERR] at net.minecraft.client.Minecraft.l(Minecraft.java:1539)
2013-03-18 14:16:49 [INFO] [STDERR] at net.minecraft.client.Minecraft.J(Minecraft.java:848)
2013-03-18 14:16:49 [INFO] [STDERR] at net.minecraft.client.Minecraft.run(Minecraft.java:773)
2013-03-18 14:16:49 [INFO] [STDERR] at java.lang.Thread.run(Unknown Source)
2013-03-18 14:16:49 [WARNING] [ForgeModLoader] The mod WR-CBE|Core was not found on the server you connected to, but requested that the server side be present
2013-03-18 14:16:49 [WARNING] [ForgeModLoader] The mod WR-CBE|RedPower was not found on the server you connected to, but requested that the server side be present
2013-03-18 14:16:49 [WARNING] [ForgeModLoader] The mod mmmPowersuits was not found on the server you connected to, but requested that the server side be present
2013-03-18 14:16:49 [WARNING] [ForgeModLoader] The mod WR-CBE|Addons was not found on the server you connected to, but requested that the server side be present
2013-03-18 14:16:52 [INFO] [STDERR] t: Ticking screen
2013-03-18 14:16:52 [INFO] [STDERR] at net.minecraft.client.Minecraft.l(Minecraft.java:1546)
2013-03-18 14:16:52 [INFO] [STDERR] at net.minecraft.client.Minecraft.J(Minecraft.java:848)
2013-03-18 14:16:52 [INFO] [STDERR] at net.minecraft.client.Minecraft.run(Minecraft.java:773)
2013-03-18 14:16:52 [INFO] [STDERR] at java.lang.Thread.run(Unknown Source)
2013-03-18 14:16:52 [INFO] [STDERR] Caused by: java.lang.IllegalArgumentException: Could not get provider type for dimension 78, does not exist
2013-03-18 14:16:52 [INFO] [STDERR] at net.minecraftforge.common.DimensionManager.getProviderType(DimensionManager.java:150)
2013-03-18 14:16:52 [INFO] [STDERR] at net.minecraftforge.common.DimensionManager.createProviderFor(DimensionManager.java:299)
2013-03-18 14:16:52 [INFO] [STDERR] at aaq.a(WorldProvider.java:208)
2013-03-18 14:16:52 [INFO] [STDERR] at ayp.<init>(WorldClient.java:60)
2013-03-18 14:16:52 [INFO] [STDERR] at ayh.a(NetClientHandler.java:307)
2013-03-18 14:16:52 [INFO] [STDERR] at dw.a(Packet1Login.java:119)
2013-03-18 14:16:52 [INFO] [STDERR] at cg.b(TcpConnection.java:458)
2013-03-18 14:16:52 [INFO] [STDERR] at ayh.d(NetClientHandler.java:240)
2013-03-18 14:16:52 [INFO] [STDERR] at ayk.c(GuiConnecting.java:49)
2013-03-18 14:16:52 [INFO] [STDERR] at net.minecraft.client.Minecraft.l(Minecraft.java:1539)
2013-03-18 14:16:52 [INFO] [STDERR] ... 3 more