Error when starting server.

[watermelon_64]

Hi! This is the error I get when I try to launch the server:

C:\Users\Elijah\Documents\My Games\minecraft\TEKKIT\tekkit 3.0.4>java -Xmx3G -Xm

s2G -jar Tekkit.jar nogui

182 recipes

27 achievements

14:09:28 [iNFO] Starting minecraft server version 1.2.5

14:09:28 [iNFO] Forge Mod Loader version @MAJOR@.@MINOR@.@REV@.@BUILD@ for Minec

raft @MCVERSION@ loading

14:09:28 [iNFO] Loading mods from C:\Users\Elijah\Documents\My Games\minecraft\T

EKKIT\tekkit 3.0.4\mods

14:09:29 [sEVERE] java.lang.UnsupportedClassVersionError: net/minecraft/server/m

od_NetherOres : Unsupported major.minor version 51.0

14:09:29 [sEVERE] at java.lang.ClassLoader.defineClass1(Native Method)

14:09:29 [sEVERE] at java.lang.ClassLoader.defineClassCond(Unknown Source)

14:09:29 [sEVERE] at java.lang.ClassLoader.defineClass(Unknown Source)

14:09:29 [sEVERE] at java.security.SecureClassLoader.defineClass(Unknown S

ource)

14:09:29 [sEVERE] at java.net.URLClassLoader.defineClass(Unknown Source)

14:09:29 [sEVERE] at java.net.URLClassLoader.access$000(Unknown Source)

14:09:29 [sEVERE] at java.net.URLClassLoader$1.run(Unknown Source)

14:09:29 [sEVERE] at java.security.AccessController.doPrivileged(Native Me

thod)

14:09:29 [sEVERE] at java.net.URLClassLoader.findClass(Unknown Source)

14:09:29 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

14:09:29 [sEVERE] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown So

urce)

14:09:29 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

14:09:29 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

14:09:29 [sEVERE] at java.lang.Class.forName0(Native Method)

14:09:29 [sEVERE] at java.lang.Class.forName(Unknown Source)

14:09:29 [sEVERE] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:4

40)

14:09:29 [sEVERE] at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.jav

a:497)

14:09:29 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:375)

14:09:29 [sEVERE] at cpw.mods.fml.common.Loader.loadMods(Loader.java:527)

14:09:29 [sEVERE] at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBuk

kitHandler.java:113)

14:09:29 [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftSe

rver.java:118)

14:09:29 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer

ver.java:426)

14:09:29 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour

ceFile:492)

14:09:29 [sEVERE] Unexpected exception

java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Un

supported 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)

>

PLEASE HELP

[penorzilla]

Your nether ores mod is out of date.

Delete the nether ores mod from your mods folder and re-run, see if your server starts without any errors.

[viktor]

Your nether ores mod is out of date.

Delete the nether ores mod from your mods folder and re-run, see if your server starts without any errors.

Thanks this solved the problem aleast for me! :D

[Dancso]

Make sure you are also using Java 7 and not Java 6 like I tried... until I realised it isn't going to work with version 6.

[MegaWhackoJacko]

Make sure you are also using Java 7 and not Java 6 like I tried... until I realised it isn't going to work with version 6.

This worked for me thx so much