I tried to use with with the CraftBukkit build #2340?
2012-09-02 17:09:14 [SEVERE] Could not load 'plugins\myBukkitAdmin.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: org/bukkit/event/player/PlayerListener
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:153)
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:222)
at org.bukkit.craftbukkit.CraftServer.(CraftServer.java:198)
at net.minecraft.server.ServerConfigurationManagerAbstract.(ServerConfigurationManagerAbstract.java:50)
at net.minecraft.server.ServerConfigurationManager.(SourceFile:11)
at net.minecraft.server.DedicatedServer.init(DedicatedServer.java:105)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:378)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.NoClassDefFoundError: org/bukkit/event/player/PlayerListener
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.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:44)
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 net.codej.mybukkitadmin.myBukkitAdmin.(myBukkitAdmin.java:37)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:149)
... 9 more
Caused by: java.lang.ClassNotFoundException: org.bukkit.event.player.PlayerListener
at org.bukkit.plugin.java.PluginClassLoader.findCl