Помогите Краш сервера()

Сервер 1.5.2 крашится примерно раз в день вот лог:

Код:

2013-12-07 12:22:45 [SEVERE] Could not pass event InventoryMoveItemEvent to ChestShop v3.5
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.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:26)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:464)
    at net.minecraft.server.v1_5_R3.TileEntityHopper.u(TileEntityHopper.java:217)
    at net.minecraft.server.v1_5_R3.TileEntityHopper.j(TileEntityHopper.java:181)
    at net.minecraft.server.v1_5_R3.TileEntityHopper.h(TileEntityHopper.java:173)
    at net.minecraft.server.v1_5_R3.World.tickEntities(World.java:1355)
    at net.minecraft.server.v1_5_R3.WorldServer.tickEntities(WorldServer.java:512)
    at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:562)
    at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:224)
    at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:472)
    at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:404)
    at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NullPointerException
2013-12-07 12:22:45 [SEVERE] Could not pass event InventoryMoveItemEvent to LWC v4.4.0 (b881) (July 11, 2013)
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.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:26)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:464)
    at net.minecraft.server.v1_5_R3.TileEntityHopper.u(TileEntityHopper.java:217)
    at net.minecraft.server.v1_5_R3.TileEntityHopper.j(TileEntityHopper.java:181)
    at net.minecraft.server.v1_5_R3.TileEntityHopper.h(TileEntityHopper.java:173)
    at net.minecraft.server.v1_5_R3.World.tickEntities(World.java:1355)
    at net.minecraft.server.v1_5_R3.WorldServer.tickEntities(WorldServer.java:512)
    at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:562)
    at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:224)
    at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:472)
    at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:404)
    at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NullPointerException

Плагины:

Плагины обновлял тоже самое. Крашится и всё.Подскажите в чём дело.