[3.0.3/3.0.4] Modloader Not Working (Assumed)

[CarltonLassiter4]

Title: Modloader Not Working (Assumed)

Version: 3.0.3/3.0.4

OS: Microsoft Windows 7, Home Edition

Java Version: 6.0.240.7

Description of Problem:

The log will freeze during the modloader portion.

Error Messages:

Error Log:

(ModLoader.java:929)

	at net.minecraft.server.ModLoader.init(ModLoader.java:683)

	... 4 more

Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0

	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)

	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 net.minecraft.server.ModLoader.addMod(ModLoader.java:172)

	... 6 more

[RedStoner]

Take a look at the caused by line and then look at the stickies.