crashing server

[ceddy4395]

Title: crashing server

Version: 3.1.3

OS: mac osx

Java Version: java 7

Description of Problem:

my server keeps on crashing when certain tings are put down can somebody help me to fix this

Error Messages:

Error Log:

19:48:33 [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)

[An Hero]

crashing when certain tings are put down

Welp, that was very informative. Try telling us what these "certain tings" are then we might be able to help.