Error Loading NetherOres

[kexus]

I just downloaded Tekkit 3.0.4, and extracted it to an empty folder. When I ran launch.bat, I got the following error message.

2012-06-01 20:35:15 [sEVERE] java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51.0

2012-06-01 20:35:15 [sEVERE] 	at java.lang.ClassLoader.defineClass1(Native Method)

2012-06-01 20:35:15 [sEVERE] 	at java.lang.ClassLoader.defineClassCond(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.lang.ClassLoader.defineClass(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.security.SecureClassLoader.defineClass(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.net.URLClassLoader.defineClass(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.net.URLClassLoader.access$000(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.net.URLClassLoader$1.run(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.security.AccessController.doPrivileged(Native Method)

2012-06-01 20:35:15 [sEVERE] 	at java.net.URLClassLoader.findClass(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.lang.ClassLoader.loadClass(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.lang.ClassLoader.loadClass(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.lang.ClassLoader.loadClass(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at java.lang.Class.forName0(Native Method)

2012-06-01 20:35:15 [sEVERE] 	at java.lang.Class.forName(Unknown Source)

2012-06-01 20:35:15 [sEVERE] 	at cpw.mods.fml.common.Loader.loadModClass(Loader.java:440)

2012-06-01 20:35:15 [sEVERE] 	at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:497)

2012-06-01 20:35:15 [sEVERE] 	at cpw.mods.fml.common.Loader.load(Loader.java:375)

2012-06-01 20:35:15 [sEVERE] 	at cpw.mods.fml.common.Loader.loadMods(Loader.java:527)

2012-06-01 20:35:15 [sEVERE] 	at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:113)

2012-06-01 20:35:15 [sEVERE] 	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:118)

2012-06-01 20:35:15 [sEVERE] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)

2012-06-01 20:35:15 [sEVERE] 	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

2012-06-01 20:35:15 [sEVERE] Unexpected exception

java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : 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 java.lang.ClassLoader.loadClass(Unknown Source)

	at java.lang.Class.forName0(Native Method)

	at java.lang.Class.forName(Unknown Source)

	at cpw.mods.fml.common.Loader.loadModClass(Loader.java:440)

	at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:497)

	at cpw.mods.fml.common.Loader.load(Loader.java:375)

	at cpw.mods.fml.common.Loader.loadMods(Loader.java:527)

	at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:113)

	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:118)

	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)

	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

I followed the instructions about adding your java directory to the Path something or other, but I got the same error. When I deleted mod_NetherOres.jar the server started up fine. I imagine this is some common problem, since all I did was download and run the provided files, but I didn't see any already existing threads about it.

So, does anyone know how to fix this? I can always just run the server without it, but I'd rather not.

[KakerMix]

You didn't follow the instructions of looking first OR using a bug report format either.

[Rheves]

Your link gives an error. I'm having this same issue, and can't seem to find the solution. I don't suppose you could provide a working link?