Bukkit

I don't know what's causing the problem I get this error. The config file is regenerated and not copied and I checked everything if it matches.

2012-03-08 01:01:36 [SEVERE] Error occurred while enabling OKB3 v3.5.0 (Is it up to date?)
java.lang.NullPointerException
    at me.kalmanolah.okb3.OKConfig.loadkeys(OKConfig.java:275)
    at me.kalmanolah.okb3.OKConfig.configCheck(OKConfig.java:35)
    at me.kalmanolah.okb3.OKConfig.<init>(OKConfig.java:20)
    at me.kalmanolah.okb3.OKmain.onEnable(OKmain.java:48)
    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:250)
    at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:232)
    at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:374)
    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:361)
    at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:187)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)