Modded MC Client Startup Crash 001

java.lang.NoClassDefFoundError: forge/ICustomItemRenderer
	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 java.lang.ClassLoader.loadClass(Unknown Source)
	at ModLoader.addMod(ModLoader.java:289)
	at ModLoader.readFromModFolder(ModLoader.java:1276)
	at ModLoader.init(ModLoader.java:887)
	at ModLoader.addAllRenderers(ModLoader.java:189)
	at ahu.<init>(ahu.java:77)
	at ahu.<clinit>(ahu.java:8)
	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)
Caused by: java.lang.ClassNotFoundException: forge.ICustomItemRenderer
	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 java.lang.ClassLoader.loadClass(Unknown Source)
	... 20 more