Forge isn't 4096 blockID patched, so you messed up the install order. Get a clean minecraft.jar and install the fix after the rest, and it should work.
Thanks for the help, I found the problem is actually mystcraft not installing correctly with the mods I am using. I had to reinstall MultiMC because Mystcraft conflicted with the mod install order.
This is the error I continually incounter trying to play with Direwolf20's mod collection
Mods loaded: 38
ModLoader 1.2.5
mod_CodeChickenCore 0.5.2
mod_4096Fix v4 for 1.2.5
mod_MinecraftForge 3.1.3.105
mod_NotEnoughItems 1.2.2.2
mod_AdditionalBuildcraftObjects 0.9.1-94 (MC 1.2.5, BC 3.1.5)
mod_BuildCraftCore 3.1.5
mod_BuildCraftBuilders 3.1.5
mod_BuildCraftEnergy 3.1.5
mod_BuildCraftFactory 3.1.5
mod_BuildCraftTransport 3.1.5
mod_SneakyPipes 0.1.1 (Minecraft 1.2.5, Buildcraft 3.1.5, Forge 3.0.1.75)
mod_LogisticsPipes 0.2.5B (built with Minecraft 1.2.5, Buildcraft 3.1.5, Forge 3.1.2.90)
mod_AdditionalPipes 3.1.0 (Minecraft 1.2.5, Buildcraft 3.1.5, Forge 3.1.3.103)
mod_BuildCraftSilicon 3.1.5
mod_DoggyTalents 1.2.5
mod_EnderStorage 1.1.1
mod_Forestry 1.4.6.1
mod_BuildCraftZFP (Forestry Package)
mod_IC2 v1.95
mod_AdvancedMachines v1.5 for IC2 1.95
mod_InvTweaks 1.41b (1.2.4)
mod_PigbearLaser 1.4
mod_CompactSolars 2.2
mod_IronChest 3.3
mod_PortalGun 1.2.5v1
mod_Railcraft 5.2.4
mod_RedPowerControl 2.0pr5b2
mod_RedPowerCore 2.0pr5b2
mod_RedPowerLighting 2.0pr5b2
mod_RedPowerLogic 2.0pr5b2
mod_RedPowerMachine 2.0pr5b2
mod_RedPowerWiring 2.0pr5b2
mod_RedPowerWorld 2.0pr5b2
mod_WirelessRedstoneCore 1.2.1
mod_WirelessRedstoneRedPower 1.2.1.1
mod_WirelessRedstoneAddons 1.2.1
mod_ThaumCraft 2.1.6
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem.
--- BEGIN ERROR REPORT b62b496d --------
Generated 5/26/12 6:16 PM
Minecraft: Minecraft 1.2.5
OS: Windows 7 (x86) version 6.1
Java: 1.6.0_30, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.8.3
OpenGL: Mobile Intel(R) 4 Series Express Chipset Family version 2.1.0 - Build 8.15.10.1892, Intel
java.lang.ArrayIndexOutOfBoundsException: 4095
at forge.Configuration.getOrCreateBlockIdProperty(Configuration.java:78)
at mod_AdvancedMachines.load(mod_AdvancedMachines.java:51)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(RenderManager.java:86)
at ahu.<clinit>(RenderManager.java:14)
at net.minecraft.client.Minecraft.a(Minecraft.java:394)
at net.minecraft.client.Minecraft.run(Minecraft.java:732)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT cd4029ef ----------
Ive found no one who knows the way to fix this.
