14:50:09 [FATAL] Error occurred while disabling IpLock v0.4 (Is it up to
 date?)
java.lang.NullPointerException
        at iplock.iplock.onDisable(iplock.java:98)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoade
r.java:362)
        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManag
er.java:399)
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginMana
ger.java:392)
        at org.bukkit.plugin.SimplePluginManager.clearPlugins(SimplePluginManage
r.java:433)
        at org.bukkit.craftbukkit.CraftServer.reload(CraftServer.java:513)
        at org.bukkit.Bukkit.reload(Bukkit.java:182)
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:
22)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:16
6)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:4
73)
        at org.bukkit.craftbukkit.CraftServer.dispatchServerCommand(CraftServer.
java:469)
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:596)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:565)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:449)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)