Windows .jar please Help! server crash on startup! :(

[Bc1151]

every time i start the server, this happens:

 [INFO] Starting minecraft server version 1.5.2
[INFO] Loading properties
[INFO] Default game type: SURVIVAL
[INFO] Generating keypair
[INFO] Starting Minecraft server on *:25566
[INFO] Preparing level "world"
[INFO] Preparing start region for level 0
[INFO] Preparing spawn area: 10%
[INFO] Preparing spawn area: 38%
[INFO] Preparing spawn area: 65%
[INFO] Preparing spawn area: 91%
[INFO] Done (7.025s)! For help, type "help" or "?"
[INFO] Damage Indicators Mod v.2.7.0.1 is out of date. v.2.9.0.0 is now available.
[SEVERE] Encountered an unexpected exception NoClassDefFoundError
java.lang.NoClassDefFoundError: net/minecraft/world/CallableLvl1
    at net.minecraft.world.World.func_72821_m(World.java:861)
    at ic2.core.EnergyNet.addTileEntity(EnergyNet.java:213)
    at ic2.core.EnergyNet$EventHandler.onEnergyTileLoad(EnergyNet.java:53)
    at net.minecraftforge.event.ASMEventHandler_28_EventHandler_onEnergyTileLoad_EnergyTileLoadEvent.invoke(.dynamic)
    at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:39)
    at net.minecraftforge.event.EventBus.post(EventBus.java:108)
    at ic2.core.block.generator.tileentity.TileEntityBaseGenerator.onLoaded(TileEntityBaseGenerator.java:114)
    at ic2.core.block.generator.tileentity.TileEntitySolarGenerator.onLoaded(TileEntitySolarGenerator.java:39)
    at ic2.core.block.TileEntityBlock$1.tickCallback(TileEntityBlock.java:48)
    at ic2.core.IC2.processTickCallbacks(IC2.java:1366)
    at ic2.core.IC2.tickStart(IC2.java:1225)
    at cpw.mods.fml.common.SingleIntervalHandler.tickStart(SingleIntervalHandler.java:28)
    at cpw.mods.fml.common.FMLCommonHandler.tickStart(FMLCommonHandler.java:122)
    at cpw.mods.fml.common.FMLCommonHandler.onPreWorldTick(FMLCommonHandler.java:295)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:638)
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:275)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:573)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:470)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)

idk how or why...
please, help!
thanks in advanced!
--Bc1151

 

[Ashzification]

Which modpack are you using and which version of the modpack?

 

[Bc1151]

Which modpack are you using and which version of the modpack?

unleashed v 1.1.4

 

[Bc1151]

i think i know whats caused this (for those people who googled the error and got here (ive been sitting where you are and have hated when they just say: Resolved )) the error ( i believe) is cause by chunks being loaded in the wrong order, and can be resolved by removing the affected mffs system, now since my server only had one at the time, that was not an issue, but sadly for some of you your server may have more than a hundred .

best wishes of luck

--Bc1151