I'm Having problem with netherores, and here is the log
C:\Users\user\Desktop\Minecraft\Minecraft\Tekkit>java -Xmx1G -Xms1G -jar Tekkit.
jar nogui
182 recipes
27 achievements
08:00:20 [Åεò±] Starting minecraft server version 1.2.5
08:00:20 [Åεò±] Attempting early MinecraftForge initialization
08:00:20 [Åεò±] Completed early MinecraftForge initialization
08:00:20 [Åεò±] Forge Mod Loader version 2.2.91.162 for Minecraft 1.2.5 loading
08:00:20 [Åεò±] Loading mods from C:\Users\user\Desktop\Minecraft\Minecraft\Tekk
it\mods
08:00:21 [îxìÉ] Failed to load mod class net/minecraft/server/mod_NetherOres.cla
ss in C:\Users\user\Desktop\Minecraft\Minecraft\Tekkit\mods\mod_NetherOres.jar
08:00:21 [Ævû╜ôI] Zip file mod_NetherOres.jar failed to read properly
08:00:21 [Åεò±] File mod_NetherOres.jar contained no mods
08:00:21 [Åεò±] Directory weaponmod contained no mods
08:00:21 [Ævû╜ôI] A problem has occured during mod loading. Likely a corrupt jar
is located in your mods directory
08:00:21 [Ævû╜ôI] cpw.mods.fml.common.LoaderException: cpw.mods.fml.common.Loade
rException: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_Net
herOres : Unsupported major.minor version 51.0
08:00:21 [Ævû╜ôI] at cpw.mods.fml.common.Loader.load(Loader.java:436)
08:00:21 [Ævû╜ôI] at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)
08:00:21 [Ævû╜ôI] at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBuk
kitHandler.java:134)
08:00:21 [Ævû╜ôI] at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:135)
08:00:21 [Ævû╜ôI] at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:438)
08:00:21 [Ævû╜ôI] at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:492)
08:00:21 [Ævû╜ôI] Caused by: cpw.mods.fml.common.LoaderException: java.lang.Unsu
pportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported majo
r.minor version 51.0
08:00:21 [Ævû╜ôI] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:5
27)
08:00:21 [Ævû╜ôI] at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.jav
a:562)
08:00:21 [Ævû╜ôI] at cpw.mods.fml.common.Loader.load(Loader.java:419)
08:00:21 [Ævû╜ôI] ... 5 more
08:00:21 [Ævû╜ôI] Caused by: java.lang.UnsupportedClassVersionError: net/minecra
ft/server/mod_NetherOres : Unsupported major.minor version 51.0
08:00:21 [Ævû╜ôI] at java.lang.ClassLoader.defineClass1(Native Method)
08:00:21 [Ævû╜ôI] at java.lang.ClassLoader.defineClassCond(Unknown Source)
08:00:21 [Ævû╜ôI] at java.lang.ClassLoader.defineClass(Unknown Source)
08:00:21 [Ævû╜ôI] at java.security.SecureClassLoader.defineClass(Unknown S
ource)
08:00:21 [Ævû╜ôI] at java.net.URLClassLoader.defineClass(Unknown Source)
08:00:21 [Ævû╜ôI] at java.net.URLClassLoader.access$000(Unknown Source)
08:00:21 [Ævû╜ôI] at java.net.URLClassLoader$1.run(Unknown Source)
08:00:21 [Ævû╜ôI] at java.security.AccessController.doPrivileged(Native Me
thod)
08:00:21 [Ævû╜ôI] at java.net.URLClassLoader.findClass(Unknown Source)
08:00:21 [Ævû╜ôI] at java.lang.ClassLoader.loadClass(Unknown Source)
08:00:21 [Ævû╜ôI] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown So
urce)
08:00:21 [Ævû╜ôI] at java.lang.ClassLoader.loadClass(Unknown Source)
08:00:21 [Ævû╜ôI] at java.lang.ClassLoader.loadClass(Unknown Source)
08:00:21 [Ævû╜ôI] at java.lang.Class.forName0(Native Method)
08:00:21 [Ævû╜ôI] at java.lang.Class.forName(Unknown Source)
08:00:21 [Ævû╜ôI] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:4
94)
08:00:21 [Ævû╜ôI] ... 7 more
08:00:21 [Ævû╜ôI] Unexpected exception
cpw.mods.fml.common.LoaderException: cpw.mods.fml.common.LoaderException: java.l
ang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsuppor
ted 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.UnsupportedClassVersio
nError: 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_Neth
erOres : 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