helpminecraft

[INFO] [Factions v1.6.7] === ENABLE START ===
2012-05-05 14:55:18 [SEVERE] Error occurred while enabling Factions v1.6.7 (Is it up to date?): com/google/gson/reflect/TypeToken
java.lang.NoClassDefFoundError: com/google/gson/reflect/TypeToken
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(Unknown Source)
	at java.security.SecureClassLoader.defineClass(Unknown Source)
	at java.net.URLClassLoader.defineClass(Unknown Source)
	at java.net.URLClassLoader.access$100(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:41)
	at org.bukkit.plugin.java.JavaPluginLoader.getClassByName(JavaPluginLoader.java:224)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:37)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at com.massivecraft.factions.P.getGsonBuilder(P.java:124)
	at com.massivecraft.factions.zcore.MPlugin.preEnable(MPlugin.java:68)
	at com.massivecraft.factions.P.onEnable(P.java:79)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:230)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:1057)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:380)
	at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:200)
	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:183)
	at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:360)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:347)
	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:178)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
Caused by: java.lang.ClassNotFoundException: com.google.gson.reflect.TypeToken
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:41)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 28 more