mod_NetherOres.jar failed to read properly

[Nareto]

Title: mod_NetherOres.jar failed to read properly

Version: 3.1.2

OS: Windows 7 Home Premium 64-bit

Java Version: Java 7 Update 7

Description of Problem:

I try to load up my Tekkit server and I get the following message:

Error Messages:

java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51.0

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

at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:562)

at cpw.mods.fml.common.Loader.load(Loader.java:419)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)

at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:134)

at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:135)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)

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

Caused by: 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:494)

... 7 more

Error Log:

2012-10-08 17:28:29 [sEVERE] Zip file mod_NetherOres.jar failed to read properly

2012-10-08 17:28:29 [FINER] THROW

cpw.mods.fml.common.LoaderException: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51.0

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

	at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:562)

	at cpw.mods.fml.common.Loader.load(Loader.java:419)

	at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)

	at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:134)

	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:135)

	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)

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

Caused by: 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:494)

	... 7 more

[andrewdonshik]

"Unsupported version".. You don't have java 7. Get it.

[Nareto]

But I do. ???

[andrewdonshik]

But I do. ???

That means you have 6 and 7. Uninstall 6.