Error

2013-07-21 05:18:31 [SEVERE] Could not pass event EntityExplodeEvent to CreepersPlus v4.2
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:30)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:478)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:463)
    at net.minecraft.server.v1_6_R2.Explosion.a(Explosion.java:220)
    at net.minecraft.server.v1_6_R2.World.createExplosion(World.java:1735)
    at net.minecraft.server.v1_6_R2.WorldServer.createExplosion(WorldServer.java:846)
    at net.minecraft.server.v1_6_R2.EntityCreeper.l_(EntityCreeper.java:102)
    at net.minecraft.server.v1_6_R2.World.entityJoinedWorld(World.java:1457)
    at net.minecraft.server.v1_6_R2.World.playerJoinedWorld(World.java:1432)
    at net.minecraft.server.v1_6_R2.World.tickEntities(World.java:1304)
    at net.minecraft.server.v1_6_R2.WorldServer.tickEntities(WorldServer.java:517)
    at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:571)
    at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:239)
    at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:481)
    at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:413)
    at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.IllegalArgumentException: n must be positive
    at java.util.Random.nextInt(Unknown Source)
    at com.github.KrazyTraynz.CreeperBlowListener.onExplosion(CreeperBlowListener.java:49)
    at sun.reflect.GeneratedMethodAccessor16.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)
    ... 17 more