Metropolis Error Log - CB Build #1988

2012-03-02 16:23:13 [SEVERE] Error occurred while enabling Metropolis v0.4.6 (Is it up to date?)
java.lang.NullPointerException
    at com.sk89q.worldguard.bukkit.ConfigurationManager.get(ConfigurationManager.java:179)
    at com.sk89q.worldguard.bukkit.WorldGuardPlugin.getRegionManager(WorldGuardPlugin.java:770)
    at com.majinnaibu.bukkitplugins.metropolis.MetropolisPlugin.onEnable(MetropolisPlugin.java:117)
    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:363)
    at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:249)
    at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:231)
    at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:356)
    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:343)
    at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:174)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:407)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)