[INFO] [CommandRank] Enabling CommandRank v3.1.1
2013-04-20 12:12:54 [SEVERE] Error occurred while enabling
 v3.1.1 (Is it up to date?)
java.lang.NullPointerException
	at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:64)
	at org.black_ixx.commandRank.helpers.ItemStackTransformer.getItemStack(ItemStackTransformer.java:18)
	at org.black_ixx.commandRank.RankUp.<init>(RankUp.java:63)
	at org.black_ixx.commandRank.CommandRank.onEnable(CommandRank.java:180)
	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_R2.CraftServer.loadPlugin(CraftServer.java:282)
	at org.bukkit.craftbukkit.v1_5_R2.CraftServer.enablePlugins(CraftServer.java:264)
	at net.minecraft.server.v1_5_R2.MinecraftServer.j(MinecraftServer.java:303)
	at net.minecraft.server.v1_5_R2.MinecraftServer.e(MinecraftServer.java:282)
	at net.minecraft.server.v1_5_R2.MinecraftServer.a(MinecraftServer.java:242)
	at net.minecraft.server.v1_5_R2.DedicatedServer.init(DedicatedServer.java:150)
	at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java:381)
	at net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:573)