Nothing happens when trying ot open a modpack

[Potatisar]

Launcher Version: newest

Operating System: windows 7 64bit

Java Version: newest

Antivirus Program: AVG

Description of Problem:

Trying to play my modpack but ntohing happens, literally nothing

Error Messages:

2013-11-02 14:14:45 [iNFO] [ForgeModLoader] Forge Mod Loader version 6.2.62.871 for Minecraft 1.6.2 loading

2013-11-02 14:14:45 [iNFO] [ForgeModLoader] Java is Java HotSpot 64-Bit Server VM, version 1.7.0_17, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre7

2013-11-02 14:14:45 [WARNING] [ForgeModLoader] The coremod appeng.transformer.AppEngCore does not have a MCVersion annotation, it may cause issues with this version of Minecraft

2013-11-02 14:14:45 [iNFO] [ForgeModLoader] [AppEng] Core Init

2013-11-02 14:14:45 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

2013-11-02 14:14:45 [WARNING] [ForgeModLoader] The coremod cofh.asm.CoFHPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

2013-11-02 14:14:45 [WARNING] [ForgeModLoader] The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

2013-11-02 14:14:45 [WARNING] [ForgeModLoader] The coremod micdoodle8.mods.miccore.MicdoodlePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

2013-11-02 14:14:45 [WARNING] [ForgeModLoader] The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

2013-11-02 14:14:45 [iNFO] [sTDOUT] Loaded 39 rules from AccessTransformer config file fml_at.cfg

2013-11-02 14:14:45 [iNFO] [sTDOUT] Loaded 107 rules from AccessTransformer config file forge_at.cfg

2013-11-02 14:14:45 [iNFO] [sTDOUT] Loaded 39 rules from AccessTransformer config file fml_at.cfg

2013-11-02 14:14:45 [iNFO] [sTDERR] Exception in thread "main" java.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/IClassTransformer

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.lang.ClassLoader.defineClass1(Native Method)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.lang.ClassLoader.defineClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.security.SecureClassLoader.defineClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.net.URLClassLoader.defineClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.net.URLClassLoader.access$100(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.net.URLClassLoader$1.run(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.net.URLClassLoader$1.run(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.security.AccessController.doPrivileged(Native Method)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.net.URLClassLoader.findClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:110)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:81)

2013-11-02 14:14:45 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.CoreModManager.injectTransformers(CoreModManager.java:402)

2013-11-02 14:14:45 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLLaunchHandler.injectPostfixTransformers(FMLLaunchHandler.java:108)

2013-11-02 14:14:45 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLLaunchHandler.appendCoreMods(FMLLaunchHandler.java:113)

2013-11-02 14:14:45 [iNFO] [sTDERR] at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:80)

2013-11-02 14:14:45 [iNFO] [sTDERR] at net.minecraft.launchwrapper.Launch.launch(Launch.java:51)

2013-11-02 14:14:45 [iNFO] [sTDERR] at net.minecraft.launchwrapper.Launch.main(Launch.java:18)

2013-11-02 14:14:45 [iNFO] [sTDERR] Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.relauncher.IClassTransformer

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.net.URLClassLoader$1.run(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.net.URLClassLoader$1.run(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.security.AccessController.doPrivileged(Native Method)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.net.URLClassLoader.findClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:99)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(Unknown Source)

2013-11-02 14:14:45 [iNFO] [sTDERR] ... 19 more

Error Log: