MinecartMania Error

10:36 AM [SEVERE] Could not pass event VehicleUpdateEvent to MinecartMania v2.5
Caused by: java.lang.NoSuchFieldError: k
	at com.afforess.minecartmania.minecarts.MMEntityMinecartChest.<init>(MMEntityMinecartChest.java:85)
	at com.afforess.minecartmania.minecarts.MMMinecart.replaceCart(MMMinecart.java:1065)
	at com.afforess.minecartmania.minecarts.MMMinecart.<init>(MMMinecart.java:107)
	at com.afforess.minecartmania.minecarts.MMStorageCart.<init>(MMStorageCart.java:81)
	at com.afforess.minecartmania.entity.MinecartManiaWorld.CreateMMMinecart(MinecartManiaWorld.java:86)
	at com.afforess.minecartmania.listeners.CoreListener.onVehicleUpdate(CoreListener.java:52)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:328)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:47)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:487)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:472)
	at net.minecraft.entity.item.EntityMinecart.func_70071_h_(EntityMinecart.java:430)
	at net.minecraft.world.World.func_72866_a(World.java:2605)
	at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:841)
	at net.minecraft.world.World.func_72870_g(World.java:2559)
	at net.minecraft.world.World.func_72939_s(World.java:2383)
	at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:672)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:917)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:432)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:783)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:646)
	at java.lang.Thread.run(Unknown Source)