KDLogger Error

[23:19:16] [Server thread/ERROR]: Could not pass event PlayerDeathEvent to KDLogger v1.0
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:294) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.callPlayerDeathEvent(CraftEventFactory.java:349) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.EntityPlayer.die(EntityPlayer.java:373) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.EntityLiving.damageEntity(EntityLiving.java:732) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.EntityHuman.damageEntity(EntityHuman.java:746) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.EntityPlayer.damageEntity(EntityPlayer.java:452) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.EntityHuman.attack(EntityHuman.java:918) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:1103) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.PacketPlayInUseEntity.a(SourceFile:55) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.PacketPlayInUseEntity.handle(SourceFile:10) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:148) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:667) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
Caused by: java.lang.NullPointerException
at adriani6.co.uk.LaughingQuoll.Main.onDeath(Main.java:54) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_03]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_03]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_03]
at java.lang.reflect.Method.invoke(Method.java:601) ~[?:1.7.0_03]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:292) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
... 19 more