[Problem] Could not pass event PlayerDeathEvent to Skript v2.1.2

[KAMIKADZEKKS]

Wiecie co może być tego przyczyną?:

2014-05-11 18:54:44 [SEVERE] Could not pass event PlayerDeathEvent to Skript v2.1.2
java.lang.NoClassDefFoundError: Could not initialize class ch.njol.skript.bukkitutil.ProjectileUtils
    at ch.njol.skript.expressions.ExprAttacker.getAttacker(ExprAttacker.java:85)
    at ch.njol.skript.expressions.ExprAttacker.getAttacker(ExprAttacker.java:94)
    at ch.njol.skript.expressions.ExprAttacker.get(ExprAttacker.java:76)
    at ch.njol.skript.expressions.ExprAttacker.get(ExprAttacker.java:1)
    at ch.njol.skript.lang.util.SimpleExpression.check(SimpleExpression.java:160)
    at ch.njol.skript.lang.util.SimpleExpression.check(SimpleExpression.java:155)
    at ch.njol.skript.conditions.CondCompare.check(CondCompare.java:239)
    at ch.njol.skript.lang.Condition.run(Condition.java:58)
    at ch.njol.skript.lang.Conditional.walk(Conditional.java:51)
    at ch.njol.skript.lang.TriggerItem.walk(TriggerItem.java:91)
    at ch.njol.skript.lang.Trigger.execute(Trigger.java:53)
    at ch.njol.skript.SkriptEventHandler.check(SkriptEventHandler.java:149)
    at ch.njol.skript.SkriptEventHandler$1.execute(SkriptEventHandler.java:109)
    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 org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callPlayerDeathEvent(CraftEventFactory.java:344)
    at net.minecraft.server.v1_5_R3.EntityPlayer.die(EntityPlayer.java:293)
    at net.minecraft.server.v1_5_R3.EntityLiving.damageEntity(EntityLiving.java:750)
    at net.minecraft.server.v1_5_R3.EntityHuman.damageEntity(EntityHuman.java:684)
    at net.minecraft.server.v1_5_R3.EntityPlayer.damageEntity(EntityPlayer.java:358)
    at net.minecraft.server.v1_5_R3.EntityArrow.l_(EntityArrow.java:229)
    at net.minecraft.server.v1_5_R3.World.entityJoinedWorld(World.java:1355)
    at net.minecraft.server.v1_5_R3.WorldServer.entityJoinedWorld(WorldServer.java:614)
    at net.minecraft.server.v1_5_R3.World.playerJoinedWorld(World.java:1336)
    at net.minecraft.server.v1_5_R3.World.tickEntities(World.java:1224)
    at net.minecraft.server.v1_5_R3.WorldServer.tickEntities(WorldServer.java:480)
    at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:563)
    at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
    at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
    at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
    at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)