Recorded by MinecraftError (https://github.com/medsouz/MinecraftError).

Automatic analysis: Hm, I can't seem to figure it out.
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LWJGL Version: 2.4.2
Exception in thread "Minecraft main thread" java.lang.NoClassDefFoundError: cpw/mods/fml/common/ITickHandler
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClassCond(Unknown Source)
	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$000(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)