ASW Error on reload and disabling!

2013-03-28 14:57:54 [INFO] [AutoSaveWorld] Disabling AutoSaveWorld v4.4
2013-03-28 14:57:54 [INFO] Saving...
2013-03-28 14:57:54 [INFO] [AutoSaveWorld] Saving...
2013-03-28 14:57:54 [SEVERE] Error occurred while disabling AutoSaveWorld v4.4 (Is it up to date?)
java.lang.NoClassDefFoundError: com/bergerkiller/bukkit/common/utils/NBTUtil
	at com.bergerkiller.bukkit.mw.MWPlayerDataController.onSave(MWPlayerDataController.java:261)
	at com.bergerkiller.bukkit.common.controller.PlayerDataController$Translator.save(PlayerDataController.java:98)
	at net.minecraft.server.v1_5_R2.PlayerList.b(PlayerList.java:193)
	at net.minecraft.server.v1_5_R2.PlayerList.savePlayers(PlayerList.java:976)
	at org.bukkit.craftbukkit.v1_5_R2.CraftServer.savePlayers(CraftServer.java:885)
	at autosave.AutoSaveThread.savePlayers(AutoSaveThread.java:115)
	at autosave.AutoSaveThread.performSave(AutoSaveThread.java:151)
	at autosave.AutoSave.onDisable(AutoSave.java:45)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:219)
	at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:481)
	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:402)
	at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:395)
	at org.bukkit.plugin.SimplePluginManager.clearPlugins(SimplePluginManager.java:436)
	at org.bukkit.craftbukkit.v1_5_R2.CraftServer.reload(CraftServer.java:599)
	at org.bukkit.Bukkit.reload(Bukkit.java:184)
	at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:187)
	at org.bukkit.craftbukkit.v1_5_R2.CraftServer.dispatchCommand(CraftServer.java:546)
	at net.minecraft.server.v1_5_R2.PlayerConnection.handleCommand(PlayerConnection.java:980)
	at net.minecraft.server.v1_5_R2.PlayerConnection.chat(PlayerConnection.java:896)
	at net.minecraft.server.v1_5_R2.PlayerConnection.a(PlayerConnection.java:841)
	at net.minecraft.server.v1_5_R2.Packet3Chat.handle(Packet3Chat.java:44)
	at org.spigotmc.netty.NettyNetworkManager.b(NettyNetworkManager.java:176)
	at net.minecraft.server.v1_5_R2.PlayerConnection.d(PlayerConnection.java:110)
	at net.minecraft.server.v1_5_R2.ServerConnection.b(SourceFile:35)
	at org.spigotmc.netty.NettyServerConnection.b(NettyServerConnection.java:66)
	at net.minecraft.server.v1_5_R2.MinecraftServer.r(MinecraftServer.java:580)
	at net.minecraft.server.v1_5_R2.DedicatedServer.r(DedicatedServer.java:229)
	at net.minecraft.server.v1_5_R2.MinecraftServer.q(MinecraftServer.java:469)
	at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java:401)
	at net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.ClassNotFoundException: com.bergerkiller.bukkit.common.utils.NBTUtil
	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.findClass0(PluginClassLoader.java:87)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 31 more
2013-03-28 14:57:54 [INFO] [Votifier] Disabling Votifier v1.9
2013-03-28 14:57:54 [WARNING] [Votifier] Protocol error. Ignoring packet - socket closed
2013-03-28 14:57:54 [INFO] [Votifier] Votifier disabled.