Player Heads Error

2013-01-30 17:28:01 [SEVERE] Could not pass event EntityDeathEvent to PlayerHeads v2.9.0082
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 org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:315)
    at net.minecraft.server.v1_4_R1.EntityLiving.dropDeathLoot(EntityLiving.java:930)
    at net.minecraft.server.v1_4_R1.EntityLiving.die(EntityLiving.java:878)
    at net.minecraft.server.v1_4_R1.EntityLiving.damageEntity(EntityLiving.java:758)
    at net.minecraft.server.v1_4_R1.EntityMonster.damageEntity(EntityMonster.java:39)
    at net.minecraft.server.v1_4_R1.Entity.y(Entity.java:324)
    at net.minecraft.server.v1_4_R1.EntityLiving.y(EntityLiving.java:310)
    at net.minecraft.server.v1_4_R1.Entity.j_(Entity.java:237)
    at net.minecraft.server.v1_4_R1.EntityLiving.j_(EntityLiving.java:508)
    at net.minecraft.server.v1_4_R1.EntityMonster.j_(EntityMonster.java:24)
    at net.minecraft.server.v1_4_R1.EntityZombie.j_(EntityZombie.java:121)
    at net.minecraft.server.v1_4_R1.World.entityJoinedWorld(World.java:1334)
    at net.minecraft.server.v1_4_R1.WorldServer.entityJoinedWorld(WorldServer.java:548)
    at net.minecraft.server.v1_4_R1.World.playerJoinedWorld(World.java:1315)
    at net.minecraft.server.v1_4_R1.World.tickEntities(World.java:1193)
    at net.minecraft.server.v1_4_R1.WorldServer.tickEntities(WorldServer.java:445)
    at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:580)
    at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
    at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
    at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
    at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NullPointerException
    at org.shininet.bukkit.playerheads.PlayerHeadsListener.EntityDeathHelper(PlayerHeadsListener.java:125)
    at org.shininet.bukkit.playerheads.PlayerHeadsListener.onEntityDeath(PlayerHeadsListener.java:95)
    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)
    ... 24 more
2013-01-30 17:28:18 [SEVERE] Could not pass event EntityDeathEvent to PlayerHeads v2.9.0082
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 org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:315)
    at net.minecraft.server.v1_4_R1.EntitySkeleton.dropDeathLoot(EntitySkeleton.java:175)
    at net.minecraft.server.v1_4_R1.EntityLiving.die(EntityLiving.java:878)
    at net.minecraft.server.v1_4_R1.EntitySkeleton.die(EntitySkeleton.java:126)
    at net.minecraft.server.v1_4_R1.EntityLiving.damageEntity(EntityLiving.java:758)
    at net.minecraft.server.v1_4_R1.EntityMonster.damageEntity(EntityMonster.java:39)
    at net.minecraft.server.v1_4_R1.Entity.y(Entity.java:324)
    at net.minecraft.server.v1_4_R1.EntityLiving.y(EntityLiving.java:310)
    at net.minecraft.server.v1_4_R1.Entity.j_(Entity.java:237)
    at net.minecraft.server.v1_4_R1.EntityLiving.j_(EntityLiving.java:508)
    at net.minecraft.server.v1_4_R1.EntityMonster.j_(EntityMonster.java:24)
    at net.minecraft.server.v1_4_R1.World.entityJoinedWorld(World.java:1334)
    at net.minecraft.server.v1_4_R1.WorldServer.entityJoinedWorld(WorldServer.java:548)
    at net.minecraft.server.v1_4_R1.World.playerJoinedWorld(World.java:1315)
    at net.minecraft.server.v1_4_R1.World.tickEntities(World.java:1193)
    at net.minecraft.server.v1_4_R1.WorldServer.tickEntities(WorldServer.java:445)
    at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:580)
    at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
    at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
    at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
    at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NullPointerException
    at org.shininet.bukkit.playerheads.PlayerHeadsListener.EntityDeathHelper(PlayerHeadsListener.java:125)
    at org.shininet.bukkit.playerheads.PlayerHeadsListener.onEntityDeath(PlayerHeadsListener.java:99)
    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)
    ... 24 more