DisguiseCraft not working

[SEVERE] Error occurred while enabling DisguiseCraft v4.9 (Is it up to date?)
java.lang.NullPointerException
	at pgDev.bukkit.DisguiseCraft.DisguiseCraft.onEnable(DisguiseCraft.java:112)
	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:382)
	at net.skycraftmc.PluginManager.PluginManagerPlugin.onCommand(PluginManagerPlugin.java:208)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:190)
	at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchCommand(CraftServer.java:527)
	at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchServerCommand(CraftServer.java:516)
	at net.minecraft.server.v1_6_R2.DedicatedServer.ar(DedicatedServer.java:275)
	at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:240)
	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)