Magic Spells error Bookworm

2011-11-01 18:45:54 [SEVERE] MagicSpells: Failed to load spell: com.nisovin.magicspells.spells.command.TomeSpell
2011-11-01 18:45:54 [SEVERE] java.lang.reflect.InvocationTargetException
2011-11-01 18:45:54 [SEVERE] 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
2011-11-01 18:45:54 [SEVERE] 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
2011-11-01 18:45:54 [SEVERE] 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
2011-11-01 18:45:54 [SEVERE] 	at java.lang.reflect.Constructor.newInstance(Unknown Source)
2011-11-01 18:45:54 [SEVERE] 	at com.nisovin.magicspells.MagicSpells.loadNormalSpells(MagicSpells.java:339)
2011-11-01 18:45:54 [SEVERE] 	at com.nisovin.magicspells.MagicSpells.load(MagicSpells.java:225)
2011-11-01 18:45:54 [SEVERE] 	at com.nisovin.magicspells.MagicSpells.onEnable(MagicSpells.java:101)
2011-11-01 18:45:54 [SEVERE] 	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:174)
2011-11-01 18:45:54 [SEVERE] 	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:957)
2011-11-01 18:45:54 [SEVERE] 	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:280)
2011-11-01 18:45:54 [SEVERE] 	at com.Technius.PluginManager.Main.onCommand(Main.java:323)
2011-11-01 18:45:54 [SEVERE] 	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
2011-11-01 18:45:54 [SEVERE] 	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:163)
2011-11-01 18:45:54 [SEVERE] 	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:355)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:757)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:722)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:715)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.Packet3Chat.a(Packet3Chat.java:33)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:92)
2011-11-01 18:45:54 [SEVERE] 	at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:501)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:471)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
2011-11-01 18:45:54 [SEVERE] 	at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
2011-11-01 18:45:54 [SEVERE] Caused by: java.lang.NoSuchMethodError: com.nisovin.bookworm.BookWorm.registerListener(Lcom/nisovin/bookworm/event/BookWormListener;)V
2011-11-01 18:45:54 [SEVERE] 	at com.nisovin.magicspells.spells.command.TomeSpell.<init>(TomeSpell.java:40)
2011-11-01 18:45:54 [SEVERE] 	... 25 more