NPE Region Own

2013-06-17 20:58:28 [INFO] [RegionOwn] Enabling RegionOwn v0.2.3
2013-06-17 20:58:28 [SEVERE] Error occurred while enabling RegionOwn v0.2.3 (Is it up to date?)
java.lang.NullPointerException
	at com.codisimus.plugins.regionown.RegionOwn.onEnable(RegionOwn.java:139)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
	at org.bukkit.craftbukkit.v1_5_R3.CraftServer.loadPlugin(CraftServer.java:282)
	at org.bukkit.craftbukkit.v1_5_R3.CraftServer.enablePlugins(CraftServer.java:264)
	at net.minecraft.server.v1_5_R3.MinecraftServer.j(MinecraftServer.java:304)
	at net.minecraft.server.v1_5_R3.MinecraftServer.e(MinecraftServer.java:283)
	at net.minecraft.server.v1_5_R3.MinecraftServer.a(MinecraftServer.java:243)
	at net.minecraft.server.v1_5_R3.DedicatedServer.init(DedicatedServer.java:151)
	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:382)
	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)