[Severe] Errors when trying to start up the Tekkit Server

[Sietse]

Title: [severe] Errors when trying to start up the Tekkit Server

Version: 3.1.2

OS: Linux Server 12 64bit

Java Version: sun-java6

Description of Problem:

Whenever i try to start up the server i get these errors shown below. I don't really understand why it is giving me errors. Does anyone know a way to fix it?

Kind Regards,

Sietse

Error Messages:

11:55:56 [iNFO] Starting minecraft server version 1.2.5

11:55:56 [iNFO] Attempting early MinecraftForge initialization

11:55:56 [iNFO] Completed early MinecraftForge initialization

11:55:56 [iNFO] Forge Mod Loader version 2.2.91.173 for Minecraft 1.2.5 loading

11:55:56 [iNFO] Loading mods from /home/sietse/Documents/tekkit server/mods

11:55:56 [WARNING] Failed to load mod class net/minecraft/server/mod_NetherOres.class in /home/sietse/Documents/tekkit server/mods/mod_NetherOres.jar

11:55:56 [sEVERE] Zip file mod_NetherOres.jar failed to read properly

11:55:56 [iNFO] File mod_NetherOres.jar contained no mods

11:55:56 [iNFO] Directory weaponmod contained no mods

11:55:56 [sEVERE] A problem has occured during mod loading. Likely a corrupt jar is located in your mods directory

11:55:56 [sEVERE] cpw.mods.fml.common.LoaderException: cpw.mods.fml.common.LoaderException: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51.0

11:55:56 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:436)

11:55:56 [sEVERE] at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)

11:55:56 [sEVERE] at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:134)

11:55:56 [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:135)

11:55:56 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)

11:55:56 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

11:55:56 [sEVERE] Caused by: cpw.mods.fml.common.LoaderException: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51.0

11:55:56 [sEVERE] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:527)

11:55:56 [sEVERE] at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:562)

11:55:56 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:419)

11:55:56 [sEVERE] ... 5 more

11:55:56 [sEVERE] Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51.0

11:55:56 [sEVERE] at java.lang.ClassLoader.defineClass1(Native Method)

11:55:56 [sEVERE] at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)

11:55:56 [sEVERE] at java.lang.ClassLoader.defineClass(ClassLoader.java:615)

11:55:56 [sEVERE] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)

11:55:56 [sEVERE] at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)

11:55:56 [sEVERE] at java.net.URLClassLoader.access$000(URLClassLoader.java:58)

11:55:56 [sEVERE] at java.net.URLClassLoader$1.run(URLClassLoader.java:197)

11:55:56 [sEVERE] at java.security.AccessController.doPrivileged(Native Method)

11:55:56 [sEVERE] at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

11:55:56 [sEVERE] at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

11:55:56 [sEVERE] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

11:55:56 [sEVERE] at java.lang.ClassLoader.loadClass(ClassLoader.java:295)

11:55:56 [sEVERE] at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

11:55:56 [sEVERE] at java.lang.Class.forName0(Native Method)

11:55:56 [sEVERE] at java.lang.Class.forName(Class.java:247)

11:55:56 [sEVERE] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:494)

11:55:56 [sEVERE] ... 7 more

11:55:56 [sEVERE] Unexpected exception

cpw.mods.fml.common.LoaderException: 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.load(Loader.java:436)

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: 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)

... 5 more

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(ClassLoader.java:631)

at java.lang.ClassLoader.defineClass(ClassLoader.java:615)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)

at java.net.URLClassLoader.access$000(URLClassLoader.java:58)

at java.net.URLClassLoader$1.run(URLClassLoader.java:197)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:295)

at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

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

at java.lang.Class.forName(Class.java:247)

at cpw.mods.fml.common.Loader.loadModClass(Loader.java:494)

... 7 more

Error Log: