Movecraft Obstruction Error

I recently installed movecraft on my server, and I configured my first ship, called an Aircraft. Everything works well, it calculates the correct percentages of required blocks (wool for me), and when I place the sign to mark it a craft and click it, it says I am piloting the craft. However, when I try to move, it says my path is obstructed, even when it is not. On the rare occasion that it does not say that, I move one block at a time but the ship does not move. I get this error in the console:

20:51:49 [WARNING] [Movecraft] Task #982 for Movecraft v3.1.25 generated an exception
java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/v1_5_R2/CraftChunk
at net.countercraft.movecraft.utils.MapUpdateManager.run(MapUpdateManager.java:92)
at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftTask.run(CraftTask.java:53)
at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:513)
at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)

This is my movecraft airship.craft config: http://pastebin.com/h22RibdZ

All the materials on the ship are listed in the approved list in the airship.craft file, so why is it not working?

 

says the movecraft version is outdated for your version of bukkit.

 

necrodoom What version of bukkit does the plugin need?