corrupt jar files on download

[Derfger]

Title: corrupt jar files on download

Version: 3.1.2

OS: windows xp

Java Version: 32bit

Description of Problem:

when i downloaded the server and try to run i get a long list of 'severe' problems one of which said i had a corrupted jar file.

Error Messages:2012-08-20 17:00:14 [sEVERE] A problem has occured during mod loading. Likely a corrupt jar is located in your mods directory

2012-08-20 17:00:14 [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

2012-08-20 17:00:14 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:436)

2012-08-20 17:00:14 [sEVERE] at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)

2012-08-20 17:00:14 [sEVERE] at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:134)

2012-08-20 17:00:14 [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:135)

2012-08-20 17:00:14 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)

2012-08-20 17:00:14 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

2012-08-20 17:00:14 [sEVERE] Caused by: cpw.mods.fml.common.LoaderException: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51.0

2012-08-20 17:00:14 [sEVERE] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:527)

2012-08-20 17:00:14 [sEVERE] at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:562)

2012-08-20 17:00:14 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:419)

2012-08-20 17:00:14 [sEVERE] ... 5 more

2012-08-20 17:00:14 [sEVERE] Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51.0

2012-08-20 17:00:14 [sEVERE] at java.lang.ClassLoader.defineClass1(Native Method)

2012-08-20 17:00:14 [sEVERE] at java.lang.ClassLoader.defineClassCond(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.lang.ClassLoader.defineClass(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.security.SecureClassLoader.defineClass(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.net.URLClassLoader.defineClass(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.net.URLClassLoader.access$000(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.net.URLClassLoader$1.run(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.security.AccessController.doPrivileged(Native Method)

2012-08-20 17:00:14 [sEVERE] at java.net.URLClassLoader.findClass(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at java.lang.Class.forName0(Native Method)

2012-08-20 17:00:14 [sEVERE] at java.lang.Class.forName(Unknown Source)

2012-08-20 17:00:14 [sEVERE] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:494)

2012-08-20 17:00:14 [sEVERE] ... 7 more

2012-08-20 17:00:14 [sEVERE] Unexpected exception

Error Log: