Got an error log:
Display Spoiler
2012-09-03 12:55:30 [INFO] Loading mods from C:\Users\Joe\AppData\Local\MultiMC\instances\My_Pack\.minecraft\mods
2012-09-03 12:55:30 [INFO] Directory ccSensors contained no mods
2012-09-03 12:55:31 [INFO] Directory rei_minimap contained no mods
2012-09-03 12:55:31 [INFO] Forge Mod Loader has loaded 19 mods
Equivalent Exchange 2: MinecraftForge minor version mismatch, expecting 3.3.x, may lead to unexpected behavior
MinecraftForge v3.4.9.171 Initialized
2012-09-03 12:55:31 [INFO] MinecraftForge v3.4.9.171 Initialized
Initializing alchemy values for Equivalent Exchange..
WARNING: Found unknown Windows version: Windows 7
Attempting to use default windows plug-in.
Loading: net.java.games.input.DirectAndRawInputEnvironmentPlugin
Removing TMI Uninstaller
Deleting Dir: C:\Users\Joe\AppData\Local\MultiMC\instances\My_Pack\.minecraft\bin\TMIUninstaller
CONFLICT @ -49 item slot already occupied by vd@31d5d0fc while adding dan200.computer.shared.ItemComputer@4c8b69f3
CONFLICT @ -48 item slot already occupied by vd@56518314 while adding dan200.computer.shared.ItemPeripheral@174c252
ComputerCraft: Searching for RedPowerLib...
ComputerCraft: RedPowerLib not found.
IndustrialCraft 2: MinecraftForge minor version mismatch, expecting 3.3.x, may lead to unexpected behavior
[IC2] Config loaded from C:\Users\Joe\AppData\Local\MultiMC\instances\My_Pack\.minecraft\config\IC2.cfg
Exception in thread "Minecraft main thread" java.lang.NoSuchMethodError: ic2.api.Ic2Recipes.addMatterAmplifier(Laan;I)V
at mod_IC2.load(mod_IC2.java:485)
at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:356)
at cpw.mods.fml.common.Loader.modInit(Loader.java:273)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:628)
at cpw.mods.fml.client.FMLClientHandler.onLoadComplete(FMLClientHandler.java:223)
at net.minecraft.client.Minecraft.a(Minecraft.java:429)
at net.minecraft.client.Minecraft.run(Minecraft.java:738)
at java.lang.Thread.run(Unknown Source)