factions error

2012-02-28 17:01:53 [INFO] [Factions] Loading Factions v1.6.6.
2012-02-28 17:01:53 [INFO] [Factions v1.6.6] === ENABLE START ===
2012-02-28 17:01:54 [SEVERE] Error occurred while enabling Factions v1.6.6 (Is it up to date?): The JsonDeserializer EnumTypeAdapter failed to deserialize json object "MEMBER" given the type class com.massivecraft.factions.struct.Role
com.google.gson.JsonParseException: The JsonDeserializer EnumTypeAdapter failed to deserialize json object "MEMBER" given the type class com.massivecraft.factions.struct.Role
	at com.google.gson.JsonDeserializerExceptionWrapper.deserialize(JsonDeserializerExceptionWrapper.java:64)
	at com.google.gson.JsonDeserializationVisitor.invokeCustomDeserializer(JsonDeserializationVisitor.java:92)
	at com.google.gson.JsonObjectDeserializationVisitor.visitFieldUsingCustomHandler(JsonObjectDeserializationVisitor.java:117)
	at com.google.gson.ReflectingFieldNavigator.visitFieldsReflectively(ReflectingFieldNavigator.java:63)
	at com.google.gson.ObjectNavigator.accept(ObjectNavigator.java:120)
	at com.google.gson.JsonDeserializationContextDefault.fromJsonObject(JsonDeserializationContextDefault.java:76)
	at com.google.gson.JsonDeserializationContextDefault.deserialize(JsonDeserializationContextDefault.java:54)
	at com.google.gson.MapTypeAdapter.deserialize(MapTypeAdapter.java:68)
	at com.google.gson.MapTypeAdapter.deserialize(MapTypeAdapter.java:33)
	at com.google.gson.JsonDeserializerExceptionWrapper.deserialize(JsonDeserializerExceptionWrapper.java:51)
	at com.google.gson.JsonDeserializationVisitor.invokeCustomDeserializer(JsonDeserializationVisitor.java:92)
	at com.google.gson.JsonDeserializationVisitor.visitUsingCustomHandler(JsonDeserializationVisitor.java:80)
	at com.google.gson.ObjectNavigator.accept(ObjectNavigator.java:101)
	at com.google.gson.JsonDeserializationContextDefault.fromJsonObject(JsonDeserializationContextDefault.java:76)
	at com.google.gson.JsonDeserializationContextDefault.deserialize(JsonDeserializationContextDefault.java:54)
	at com.google.gson.Gson.fromJson(Gson.java:551)
	at com.google.gson.Gson.fromJson(Gson.java:498)
	at com.google.gson.Gson.fromJson(Gson.java:467)
	at com.google.gson.Gson.fromJson(Gson.java:417)
	at com.massivecraft.factions.zcore.persist.EntityCollection.loadCore(EntityCollection.java:219)
	at com.massivecraft.factions.zcore.persist.EntityCollection.loadFromDisc(EntityCollection.java:195)
	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:199)
	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:182)
	at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:357)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:344)
	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:175)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:408)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
Caused by: java.lang.IllegalArgumentException: No enum const class com.massivecraft.factions.struct.Role.MEMBER
	at java.lang.Enum.valueOf(Unknown Source)
	at com.google.gson.DefaultTypeAdapters$EnumTypeAdapter.deserialize(DefaultTypeAdapters.java:524)
	at com.google.gson.DefaultTypeAdapters$EnumTypeAdapter.deserialize(DefaultTypeAdapters.java:514)
	at com.google.gson.JsonDeserializerExceptionWrapper.deserialize(JsonDeserializerExceptionWrapper.java:51)
	... 31 more