Error Code Bukkit server

I am running a bukkit server, dedicated 4 gigs of ram to it and I have an error code, By the way, this is a tekkit server, they do not have a help site and I decided to go here because they use bukkit anyways, so here is the code

13:02:40 [SEVERE] java.lang.NoSuchMethodError: buildcraft.api.PowerProvider.receiveEnergy(I)V
13:02:40 [SEVERE]at buildcraft.energy.TileEngine.q_(TileEngine.java:126)
13:02:40 [SEVERE]at net.minecraft.server.World.tickEntities(World.java:1189)
13:02:40 [SEVERE]at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:559)
13:02:40 [SEVERE]at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:457)
13:02:40 [SEVERE]at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
13:02:40 [SEVERE] Unexpected exception
java.lang.NoSuchMethodError: buildcraft.api.PowerProvider.receiveEnergy(I)V
at buildcraft.energy.TileEngine.q_(TileEngine.java:126)
at net.minecraft.server.World.tickEntities(World.java:1189)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:559)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:457)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
>
PLease help me, This comes up every time someone joins my server, also after this pops up, the server in tekkit says its offline

 

That's a buildcraft error. Have you brought that up with the developer of BuildCraft?

 

Sorry not yet, not sure really how lol im pretty new to coding and stuff
Will do though