Industrial craft crash on server

1st Official Post
    Quote from RichardG

    Second one asking that today... Run it by doubleclicking


    Checking for Minecraft launcher (minecrafterr.jar) in C:\Users\NICO\AppData\Roaming\.minecraft\minecrafterr.jar
    Minecraft launcher found!
    Starting launcher...
    27 achievements
    174 recipes
    ModLoader 1.1 Initializing...
    Mod Initialized: mod_ModLoaderMp 1.1
    Mod Initialized: mod_MinecraftForge 1.3.3.12
    Mod Initialized: mod_BuildCraftCore 2.2.12
    Mod Initialized: mod_BuildCraftBuilders 2.2.12
    Mod Initialized: mod_BuildCraftEnergy 2.2.12
    Mod Initialized: mod_BuildCraftFactory 2.2.12
    Mod Initialized: mod_BuildCraftTransport 2.2.12
    MinecraftForge v1.3.3.12 Initialized
    Mod Initialized: mod_IC2 v1.64
    Mod Loaded: mod_ModLoaderMp 1.1
    Mod Loaded: mod_MinecraftForge 1.3.3.12
    Mod Loaded: mod_BuildCraftCore 2.2.12
    Mod Loaded: mod_BuildCraftBuilders 2.2.12
    Mod Loaded: mod_BuildCraftEnergy 2.2.12
    Mod Loaded: mod_BuildCraftFactory 2.2.12
    Mod Loaded: mod_BuildCraftTransport 2.2.12
    [IC2] Config loaded from C:\Users\NICO\AppData\Roaming\.minecraft\config\IC2.cfg
    [IC2] Using 32 audio sources.
    ModLoaderMP 1.0.0 Initialized
    Mod Loaded: mod_IC2 v1.64
    Starting BuildCraft 2.2.12
    Copyright (c) SpaceToad, 2011
    http://www.mod-buildcraft.com
    [IC2] Trying to load IC2 submodule: bcIntegration31x
    [IC2] Can't load submodule: java.lang.reflect.InvocationTargetException
    [IC2] Trying to load IC2 submodule: bcIntegration22x
    [IC2] BuildCraft integration module loaded
    [IC2] Trying to load IC2 submodule: cgIntegration14x
    [IC2] Can't load submodule: java.lang.reflect.InvocationTargetException
    [IC2] Trying to load IC2 submodule: neiIntegration11x
    [IC2] Can't load submodule: java.lang.reflect.InvocationTargetException
    Done.
    WARNING: Found unknown Windows version: Windows 7
    Attempting to use default windows plug-in.
    Loading: net.java.games.input.DirectAndRawInputEnvironmentPlugin

    Starting up SoundSystem...
    Initializing LWJGL OpenAL
    (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
    OpenAL initialized.

    Connecting to 84.105.186.168, 25565
    Stopping!

    SoundSystem shutting down...
    Author: Paul Lamb, https://forum.industrial-craft.net/www.paulscode.com

    18-feb-2012 15:18:46 forge.ForgeHooks <clinit>
    INFO: MinecraftForge v1.3.3.12 Initialized

    java.lang.AbstractMethodError: ic2.common.ItemArmorLappack.getArmorDisplay(Lxb;Lyq;I)I
    at agq.a(GuiIngame.java:116)
    at kz.b(EntityRenderer.java:763)
    at EntityRendererProxy.b(EntityRendererProxy.java:15)
    at net.minecraft.client.Minecraft.x(SourceFile:742)
    at net.minecraft.client.Minecraft.run(SourceFile:662)
    at java.lang.Thread.run(Unknown Source)
    Error report complete.
    the program says this

    Error report complete.

    Here's my guess as to what went wrong:

    Hm, I can't seem to figure it out. If your client failed to load press Paste Error and show that link to #Risucraft on esper.net
    Posting to pastebin.com...
    http://pastebin.com/wPd16qjC

    The server starts but I can't get rid of this error. Console mode works though.
    MLMP 2.1
    Forge 1.3.3.12
    IC² 1.70

    Display Spoiler