Heres my error message
is the result of incorrect versions
Mods loaded: 15
ModLoader 1.1
mod_ModLoaderMp 1.0.0
mod_BuildCraftFactory 2.2.12
mod_BuildCraftCore 2.2.12
mod_BuildCraftEnergy 2.2.12
mod_BuildCraftBuilders 2.2.12
mod_BuildCraftTransport 2.2.12
mod_RedPowerLighting 2.0pr4d
mod_RedPowerWiring 2.0pr4d
mod_RedPowerCore 2.0pr4d
mod_RedPowerArray 2.0pr4d
mod_RedPowerLogic 2.0pr4d
mod_RedPowerMachine 2.0pr4d
mod_RedPowerWorld 2.0pr4d
mod_zAdditionalPipes Rev32.3
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem.
If you wish to report this, please copy this entire text and email it to support@mojang.com.
Please include a description of what you did when the error occured.
--- BEGIN ERROR REPORT e4927839 --------
Generated 12/02/12 9:13 AM
Minecraft: Minecraft 1.1
OS: Windows 7 (amd64) version 6.1
Java: 1.7.0_02, Oracle Corporation
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: AMD Radeon HD 6800 Series version 4.1.10750 Compatibility Profile Context, ATI Technologies Inc.
java.lang.NoClassDefFoundError: ic2/api/IEnergySink
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.lang.Class.getDeclaredFields(Unknown Source)
at ModLoader.setupProperties(ModLoader.java:1728)
at ModLoader.addMod(ModLoader.java:268)
at ModLoader.readFromClassPath(ModLoader.java:1239)
at ModLoader.init(ModLoader.java:819)
at ModLoader.AddAllRenderers(ModLoader.java:189)
at afq.<init>(afq.java:80)
at afq.<clinit>(afq.java:9)
at net.minecraft.client.Minecraft.a(SourceFile:265)
at net.minecraft.client.Minecraft.run(SourceFile:648)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: ic2.api.IEnergySink
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 25 more
--- END ERROR REPORT b9240c0f ----------