[03:38:08 ERROR]: Could not pass event VehicleUpdateEvent to MinecartMania v2.3.2
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427) ~[spigot.jar:git-Spigot-1171]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-1171]
        at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30) ~[spigot.jar:git-Spigot-1171]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:478) [spigot.jar:git-Spigot-1171]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:463) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.EntityMinecartAbstract.h(EntityMinecartAbstract.java:319) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.World.entityJoinedWorld(World.java:1463) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.World.playerJoinedWorld(World.java:1439) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.World.tickEntities(World.java:1308) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.WorldServer.tickEntities(WorldServer.java:508) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:626) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:259) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:530) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:442) [spigot.jar:git-Spigot-1171]
        at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1171]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_6_R3/World
        at com.afforess.minecartmania.entity.MinecartManiaWorld.getOrCreateMMMinecart(MinecartManiaWorld.java:86) ~[?:?]
        at com.afforess.minecartmania.listeners.CoreListener.onVehicleUpdate(CoreListener.java:41) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_45]
        at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_45]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425) ~[spigot.jar:git-Spigot-1171]
        ... 14 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_6_R3.World
        at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70) ~[spigot.jar:git-Spigot-1171]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53) ~[spigot.jar:git-Spigot-1171]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_45]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_45]
        at com.afforess.minecartmania.entity.MinecartManiaWorld.getOrCreateMMMinecart(MinecartManiaWorld.java:86) ~[?:?]
        at com.afforess.minecartmania.listeners.CoreListener.onVehicleUpdate(CoreListener.java:41) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_45]
        at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_45]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425) ~[spigot.jar:git-Spigot-1171]
        ... 14 more