Помогите исправить ошибку в плагине

Плагин GhostHunt http://dev.bukkit.org/bukkit-plugins/ghost-hunt/

Ошибка в консоле

[SEVERE] Could not load 'plugins\Ghost_Hunt_v.0.4.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/Nummer378/GhostHunt/GhostHunt : Unsupported major.minor version 51.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:184)
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.loadPlugins(CraftServer.java:239)
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.<init>(CraftServer.java:217)
at net.minecraft.server.v1_5_R3.PlayerList.<init>(PlayerList.java:55)
at net.minecraft.server.v1_5_R3.DedicatedPlayerList.<init>(SourceFile:11)
at net.minecraft.server.v1_5_R3.DedicatedServer.init(DedicatedServer.java:106)
at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:382)
at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.UnsupportedClassVersionError: me/Nummer378/GhostHunt/GhostHunt : 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 org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:80)
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
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 org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:173)
... 9 more

 

Java обнови.

 

Обновил и все ровно ошибка

 

bukkit API и версия craftbukkit совпадают?

 

Конечно, версии не совпадают. Java.