Multi Verse error?

Everytime i start my server this is what i get for an error about MultiVerse.

Now the reason i noticed this is because everytime i log back into my server and want to go to my Survival world, i have to keep re-importing the world.

Anyone else getting this issue?

Code:

SEVERE] pvpMode loading MultiVerse v1.6.4 (Is it up to date?)
java.lang.NoSuchFieldError: pvpMode
at com.onarandombox.Rigby.MultiVerse.MultiVerse.loadWorlds(MultiVerse.java:422)
at com.onarandombox.Rigby.MultiVerse.MultiVerse.onEnable(MultiVerse.java:156)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:127)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:632)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:218)
at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:116)
at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:94)
at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:217)
at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:204)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:144)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:259

 

Update to the latest RB of CB.

 

Of Craftbook? im using Falsebook, so should i update falsebook?

and i am using the current B770?

EDIT:
contatcing my server provider to upload b766

 

Um, CB would be CraftBukkit and you would be running CB770. Bukkit is only on build 681 for the recommended build.