tekkit server error

[Rutger]

Title: tekkit server error

Version: 3.1.3

OS: MAC OS X 10.8.2

Java Version: Latest

Description of Problem:

Unexprcted Exception Wount let me stay logged in

Error Messages:

unexpected exception

Error Log:

10:48:24 [sEVERE] Unexpected exception

java.lang.NoSuchMethodError: buildcraft.api.PowerProvider.useEnergy(IIZ)I

	at buildcraft.factory.TilePump.q_(TilePump.java:84)

	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)

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