Server website shows server "UP" but Tekkit shows it as not up

[mabpwnu]

Title: Server website shows server "UP" but Tekkit shows it as not up

Version: 3.1.2

OS: windows 7 pro 64bit

Java Version: 64bit

Description of Problem:

I dont know if im posting this in the right place and im failry new to tekkit. But me and my cousin were playing on a server i recently rented and all has been goign good until today when we built a quarry and were trying to set it up. I went to put wood pipes on the quarry to connect it to my chest and after i put a few the game just crashed, when i tried to reconnect to the server it kept showing it asif the server wasnt up and couldnt "pole" the server. The website where i manage my server shows it as up. i noticed some lines in the command section that said "SEVERE at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)" tahts just 1 example. how would i go about fixing this so i can start playing my server again :/

Error Messages:

Error Log:

01.12 01:13:03 [server] SEVERE Unexpected exception

01.12 01:13:03 [server] SEVERE at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

01.12 01:13:03 [server] SEVERE at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

01.12 01:13:03 [server] SEVERE at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

01.12 01:13:03 [server] SEVERE at net.minecraft.server.World.tickEntities(World.java:1190)

01.12 01:13:03 [server] SEVERE at buildcraft.energy.TileEngine.q_(TileEngine.java:126)

01.12 01:13:03 [server] SEVERE java.lang.NoSuchMethodError: buildcraft.api.PowerProvider.receiveEnergy(I)V