otherdrops custom profession error

01:15:47 [SEVERE] Could not pass event EntityDeathEvent to OtherDrops v2.8b.566
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:427)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:462)
        at org.bukkit.craftbukkit.v1_6_R2.event.CraftEventFactory.callEntityDeat
hEvent(CraftEventFactory.java:329)
        at net.minecraft.server.v1_6_R2.EntityInsentient.dropDeathLoot(EntityIns
entient.java:199)
        at net.minecraft.server.v1_6_R2.EntityLiving.die(EntityLiving.java:757)
        at net.minecraft.server.v1_6_R2.EntityLiving.damageEntity(EntityLiving.j
ava:709)
        at net.minecraft.server.v1_6_R2.EntityMonster.damageEntity(EntityMonster
.java:39)
        at net.minecraft.server.v1_6_R2.EntityZombie.damageEntity(EntityZombie.j
ava:127)
        at net.minecraft.server.v1_6_R2.EntityHuman.attack(EntityHuman.java:884)

        at net.minecraft.server.v1_6_R2.PlayerConnection.a(PlayerConnection.java
:1121)
        at net.minecraft.server.v1_6_R2.Packet7UseEntity.handle(SourceFile:36)
        at net.minecraft.server.v1_6_R2.NetworkManager.b(NetworkManager.java:296
)
        at net.minecraft.server.v1_6_R2.PlayerConnection.e(PlayerConnection.java
:116)
        at net.minecraft.server.v1_6_R2.ServerConnection.b(SourceFile:37)
        at net.minecraft.server.v1_6_R2.DedicatedServerConnection.b(SourceFile:3
0)
        at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:5
90)
        at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:2
26)
        at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:4
86)
        at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java
:419)
        at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:5
82)
Caused by: org.bukkit.command.CommandException: Unhandled exception executing co
mmand 'cpa' in plugin CustomProfessions v0.3.6
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:18
9)
        at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchCommand(CraftServe
r.java:523)
        at com.gmail.zariust.otherdrops.event.DropRunner.processCommands(DropRun
ner.java:342)
        at com.gmail.zariust.otherdrops.event.DropRunner.run(DropRunner.java:216
)
        at com.gmail.zariust.otherdrops.OtherDrops.scheduleDrop(OtherDrops.java:
574)
        at com.gmail.zariust.otherdrops.OtherDrops.performDrop(OtherDrops.java:3
05)
        at com.gmail.zariust.otherdrops.listener.OdEntityListener.onEntityDeath(
OdEntityListener.java:87)
        at sun.reflect.GeneratedMethodAccessor99.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.ja
va:425)
        ... 21 more
Caused by: java.lang.NullPointerException
        at guy.theoneandonly.customProfessions.commands.Cpa.onCommand(Cpa.java:2
9)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
        ... 32 more