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