error with dvz

2012-07-21 13:20:19 [INFO] [MobDisguise] Enabling MobDisguise v1.81
2012-07-21 13:20:19 [INFO] [MobDisguise] by desmin88 version 1.81 enabled.
2012-07-21 13:20:19 [INFO] [Dwarves vs Zombies] Enabling Dwarves vs Zombies v12.05.23
2012-07-21 13:20:19 [INFO] [Dwarves vs Zombies] Hooked Into Mob Disguise
2012-07-21 13:20:19 [SEVERE] Error occurred while enabling Dwarves vs Zombies v12.05.23 (Is it up to date?)
java.lang.NullPointerException
	at com.imdeity.dvz.DvZ.initGame(DvZ.java:111)
	at com.imdeity.dvz.DvZ.onEnable(DvZ.java:89)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:215)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:336)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
	at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:250)
	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:232)
	at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:371)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:358)
	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:187)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:422)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)