14:01:56 [SEVERE] Could not load 'plugins\Vault.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: Bad version num
ber in .class file
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:150)
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:287)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:211)
at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:207)
at org.bukkit.craftbukkit.CraftServer.(CraftServer.java:183)
at net.minecraft.server.ServerConfigurationManager.(ServerConfigurationManager.java
:53)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:156)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
Caused by: java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
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$100(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.findClass(PluginClassLoader.java:41)
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(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:139)
... 8 more

Running with iC6 & PermissionsBukkit 1.6

Figured out the problem, I need to update the Java on this computer.

Haha, using school computer.

Vault requires Java 1.6 or later. you're trying to use an older version of Java most likely.