commandbook error

2011-04-03 20:12:28 [INFO] Starting minecraft server version Beta 1.4
2011-04-03 20:12:28 [INFO] Loading properties
2011-04-03 20:12:28 [INFO] Starting Minecraft server on *:25565
2011-04-03 20:12:28 [INFO] This server is running Craftbukkit version git-Bukkit-0.0.0-612-g4c7a9e7-b617jnks (MC: 1.4)
2011-04-03 20:12:28 [INFO] Preparing level "Neighborhood"
2011-04-03 20:12:28 [INFO] Preparing start region
2011-04-03 20:12:28 [INFO] 144 recipes
2011-04-03 20:12:29 [SEVERE] Could not load plugins\CommandBook.jar in plugins: null
org.bukkit.plugin.InvalidPluginException
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:105)
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:158)
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:106)
	at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:63)
	at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:215)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:202)
	at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:142)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:257)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:375)
Caused by: java.lang.NoClassDefFoundError: com/sk89q/minecraft/util/commands/CommandPermissionsException
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:97)
	... 8 more
Caused by: java.lang.ClassNotFoundException: com.sk89q.minecraft.util.commands.CommandPermissionsException
	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:36)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:24)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 11 more
2011-04-03 20:12:29 [INFO] Invalid config file found and converted to proper name/format.
2011-04-03 20:12:29 [INFO] [Permissions] (Phoenix) was Initialized.
2011-04-03 20:12:29 [INFO] [mcMMO] Permissions enabled.
2011-04-03 20:12:29 [INFO] mcMMO version 0.9.15 is enabled!
2011-04-03 20:12:29 [INFO] MoveCraft 0.6.8 beta plugin enabled
2011-04-03 20:12:29 [INFO] [MultiInv] Shared worlds loaded succesfully
2011-04-03 20:12:29 [INFO] [MultiInv] version 1.5.0 is enabled!
2011-04-03 20:12:29 [INFO] [MultiVerse] - Version 1.6 (Permissions 2.5.5) Enabled
2011-04-03 20:12:29 [INFO] [MultiVerse] Loading World & Settings - 'Survival' - NORMAL
2011-04-03 20:12:29 [INFO] [MultiInv] Detected Survival. Reloading shares.txt
2011-04-03 20:12:29 [INFO] [MultiInv] Shared worlds loaded succesfully
2011-04-03 20:12:29 [SEVERE] Nag author: 'Pluckerpluck' of 'MultiInv' about the following: onWorldLoad has been replaced with a new signature, (WorldLoadEvent)
2011-04-03 20:12:29 [INFO] [MultiVerse] Loading World & Settings - 'Neighborhood' - NORMAL
2011-04-03 20:12:29 [INFO] [MultiVerse] 2 - World(s) loaded.
2011-04-03 20:12:29 [INFO] [MultiVerse] Loading Portals
2011-04-03 20:12:29 [INFO] [MultiVerse] 0 - Portal(s) loaded.
2011-04-03 20:12:29 [INFO] [Permissions] version [2.5.5] (Phoenix)  loaded
2011-04-03 20:12:29 [INFO] Done (0.118s)! For help, type "help" or "?"