Bukkit

What steps will reproduce the problem?
1. Bukkit 1.4.5-R0.2 (2488)
2. Multiverse 2.5 (639)
3. CG 0.7.2

What is the expected output? What do you see instead?
2012-11-23 23:28:42 [SEVERE] Could not pass event EntityExplodeEvent to CreativeGuard v0.7.2
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:341)
    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 net.minecraft.server.Explosion.a(Explosion.java:219)
    at net.minecraft.server.World.createExplosion(World.java:1610)
    at net.minecraft.server.WorldServer.createExplosion(WorldServer.java:771)
    at org.bukkit.craftbukkit.CraftWorld.createExplosion(CraftWorld.java:446)
    at org.bukkit.craftbukkit.CraftWorld.createExplosion(CraftWorld.java:438)
    at com.timvisee.DungeonMaze.populator.ExplosionPopulator.populate(ExplosionPopulator.java:57)
    at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:217)
    at net.minecraft.server.Chunk.a(Chunk.java:794)
    at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:127)
    at net.minecraft.server.PlayerInstance.<init>(PlayerInstance.java:22)
    at net.minecraft.server.PlayerManager.a(PlayerManager.java:68)
    at net.minecraft.server.PlayerManager.movePlayer(PlayerManager.java:197)
    at net.minecraft.server.ServerConfigurationManagerAbstract.d(ServerConfigurationManagerAbstract.java:193)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:424)
    at net.minecraft.server.Packet10Flying.handle(SourceFile:136)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:290)
    at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:113)
    at net.minecraft.server.ServerConnection.b(SourceFile:39)
    at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:595)
    at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:493)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.NullPointerException
2012-11-23 23:28:42 [SEVERE] Could not pass event EntityExplodeEvent to CreativeGuard v0.7.2
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:341)
    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 net.minecraft.server.Explosion.a(Explosion.java:219)
    at net.minecraft.server.World.createExplosion(World.java:1610)
    at net.minecraft.server.WorldServer.createExplosion(WorldServer.java:771)
    at org.bukkit.craftbukkit.CraftWorld.createExplosion(CraftWorld.java:446)
    at org.bukkit.craftbukkit.CraftWorld.createExplosion(CraftWorld.java:438)
    at com.timvisee.DungeonMaze.populator.ExplosionPopulator.populate(ExplosionPopulator.java:57)
    at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:217)
    at net.minecraft.server.Chunk.a(Chunk.java:802)
    at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:127)
    at net.minecraft.server.PlayerInstance.<init>(PlayerInstance.java:22)
    at net.minecraft.server.PlayerManager.a(PlayerManager.java:68)
    at net.minecraft.server.PlayerManager.movePlayer(PlayerManager.java:197)
    at net.minecraft.server.ServerConfigurationManagerAbstract.d(ServerConfigurationManagerAbstract.java:193)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:424)
    at net.minecraft.server.Packet10Flying.handle(SourceFile:136)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:290)
    at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:113)
    at net.minecraft.server.ServerConnection.b(SourceFile:39)
    at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:595)
    at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:493)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.NullPointerException

Please provide any additional information below.

This error msg spamms the console every second