2013-06-05 01:18:17 [INFO] [HerobrineAI] Enabling HerobrineAI v3.1.2
2013-06-05 01:18:17 [SEVERE] Error occurred while enabling HerobrineAI v3.1.2 (Is it up to date?)
java.lang.NoClassDefFoundError: net/minecraft/server/v1_5_R3/World
	at org.jakub1221.herobrineai.HerobrineAI.onEnable(HerobrineAI.java:73)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:396)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.loadPlugin(CraftServer.java:306)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.enablePlugins(CraftServer.java:288)
	at net.minecraft.server.MinecraftServer.j(MinecraftServer.java:505)
	at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:471)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:417)
	at ho.c(DedicatedServer.java:203)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:612)
	at fy.run(ThreadMinecraftServer.java:16)
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_5_R3.World
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:255)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:247)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
	... 12 more