-SOLVED-Weird server error?

So I remade my server because of 1.1 and me and my other admin were building a subway mechanism and we put a minecart down and it made an error so we restarted server and anytime we get in range of this minecart it does this error:

Code:

2012-01-12 21:17:14 [SEVERE] java.lang.NoSuchFieldError: bN
2012-01-12 21:17:14 [SEVERE]     at com.bergerkiller.bukkit.tc.NativeMinecartMember.move(NativeMinecartMember.java:690)
2012-01-12 21:17:14 [SEVERE]     at net.minecraft.server.EntityMinecart.y_(EntityMinecart.java:396)
2012-01-12 21:17:14 [SEVERE]     at net.minecraft.server.World.entityJoinedWorld(World.java:1257)
2012-01-12 21:17:14 [SEVERE]     at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:110)
2012-01-12 21:17:14 [SEVERE]     at net.minecraft.server.World.playerJoinedWorld(World.java:1239)
2012-01-12 21:17:14 [SEVERE]     at net.minecraft.server.World.tickEntities(World.java:1146)
2012-01-12 21:17:14 [SEVERE]     at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:525)
2012-01-12 21:17:14 [SEVERE]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:432)
2012-01-12 21:17:14 [SEVERE]     at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
2012-01-12 21:17:15 [SEVERE] Unexpected exception
java.lang.NoSuchFieldError: bN

I'm on build #1718 and its still doing this, but the only way i think to undo this is to clear map, but we spent alot of time on making our stuff and if we can save this in anyway, it would be appreciated.

Thanks.

 

Follow part 2 of this guide:
http://forums.bukkit.org/threads/how-to-fix-your-world-errors-corrupt-chunks.54254/

 

You'll need to disable the TrainCarts plugin until its updated to support 1.1

 

Didnt think about that, trying now...

Thanks alot!

EDIT by Moderator: merged posts, please use the edit button instead of double posting.