Помогите Ошибки ChestShop

Начали появлятси ошибки в консоле!
Что это за ошибки и как с ними боротси?

Spoiler

2013-01-18 20:03:22 [SEVERE] Could not pass event SignChangeEvent to ChestShop v3.46
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
at net.minecraft.server.v1_4_5.NetServerHandler.a(NetServerHandler.java:1407)
at net.minecraft.server.v1_4_5.Packet130UpdateSign.handle(SourceFile:46)
at net.minecraft.server.v1_4_5.NetworkManager.b(NetworkManager.java:290)
at net.minecraft.server.v1_4_5.NetServerHandler.d(NetServerHandler.java:113)
at net.minecraft.server.v1_4_5.ServerConnection.b(SourceFile:39)
at net.minecraft.server.v1_4_5.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_4_5.MinecraftServer.r(MinecraftServer.java:597)
at net.minecraft.server.v1_4_5.DedicatedServer.r(DedicatedServer.java:222)
at net.minecraft.server.v1_4_5.MinecraftServer.q(MinecraftServer.java:493)
at net.minecraft.server.v1_4_5.MinecraftServer.run(MinecraftServer.java:426)
at net.minecraft.server.v1_4_5.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)
at com.Acrobot.Breeze.Utils.MaterialUtil$Enchantment.getEnchantments(MaterialUtil.java:246)
at com.Acrobot.Breeze.Utils.MaterialUtil.getEnchantments(MaterialUtil.java:229)
at com.Acrobot.Breeze.Utils.MaterialUtil.getItem(MaterialUtil.java:182)
at com.Acrobot.ChestShop.Listeners.Block.SignChange.onSignChange(SignChange.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
... 14 more

 

Заново сборку собирай ._.
Есть самопис плагины ?