2013-01-28 20:20:35 [INFO] [TekkitCustomizer] Enabling TekkitCustomizer v1.5.2
2013-01-28 20:20:35 [INFO] TekkitCustomizer: TekkitCustomizer enabled.
2013-01-28 20:20:35 [SEVERE] Error occurred while enabling TekkitCustomizer v1.5.2 (Is it up to date?)
java.lang.AbstractMethodError
	at org.bukkit.craftbukkit.v1_4_R1.inventory.RecipeIterator.next(RecipeIterator.java:30)
	at org.bukkit.craftbukkit.v1_4_R1.inventory.RecipeIterator.next(RecipeIterator.java:9)
	at me.ryanhamshire.TekkitCustomizer.TekkitCustomizer.loadConfiguration(TekkitCustomizer.java:126)
	at me.ryanhamshire.TekkitCustomizer.TekkitCustomizer.onEnable(TekkitCustomizer.java:96)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:426)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.loadPlugin(CraftServer.java:293)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.enablePlugins(CraftServer.java:275)
	at net.minecraft.server.MinecraftServer.j(MinecraftServer.java:534)
	at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:500)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:426)
	at ho.c(DedicatedServer.java:194)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:656)
	at fy.run(ThreadMinecraftServer.java:16)