booktext

2012-12-23 10:16:14 [INFO] [BookText] Enabling BookText v0.3
2012-12-23 10:16:14 [SEVERE] Error occurred while enabling BookText v0.3 (Is it up to date?)
java.lang.NoClassDefFoundError: net/minecraft/server/NBTBase
    at pl.mineville.ajaw.Main.onEnable(Main.java:22)
    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_4_6.CraftServer.loadPlugin(CraftServer.java:315)
    at org.bukkit.craftbukkit.v1_4_6.CraftServer.enablePlugins(CraftServer.java:297)
    at net.minecraft.server.v1_4_6.MinecraftServer.j(MinecraftServer.java:326)
    at net.minecraft.server.v1_4_6.MinecraftServer.e(MinecraftServer.java:305)
    at net.minecraft.server.v1_4_6.MinecraftServer.a(MinecraftServer.java:264)
    at net.minecraft.server.v1_4_6.DedicatedServer.init(DedicatedServer.java:149)
    at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:404)
    at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.NBTBase
    at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 12 more