Can't Load Downloaded World to Client or Server, Both Crash Immediately

[ButterNoms]

Hey, guys!

I came on here wondering if anyone could help me out with a bit of a bug I'm having with Tekkit Classic 3.1.3.

Basically, my problem is that I can't load one of the worlds I've download onto a server or my client. When I do this, it crashes out with an odd error about IC2 and getReactorTickRate().

I'll hyperlink the PMC post of the world I'm using HERE.

I'll hyperlink the crash report (FML log) I get HERE. (This is mediafire)

I can't get a shortened crash report, because Minecraft closes out to a white screen.

I CAN give you the server's crash, though.

Here's the stacktrace:

16:47:55 [sEVERE] java.lang.RuntimeException: java.lang.NoSuchMethodException: i

c2.common.TileEntityNuclearReactor.tickRate()

16:47:55 [sEVERE]      at nuclearcontrol.NuclearHelper.getReactorTickRate(Nucle

arHelper.java:304)

16:47:55 [sEVERE]      at nuclearcontrol.TileEntityRemoteThermo.checkStatus(Til

eEntityRemoteThermo.java:101)

16:47:55 [sEVERE]      at nuclearcontrol.TileEntityIC2Thermo.q_(TileEntityIC2Th

ermo.java:244)

16:47:55 [sEVERE]      at nuclearcontrol.TileEntityRemoteThermo.q_(TileEntityRe

moteThermo.java:237)

16:47:55 [sEVERE]      at net.minecraft.server.World.tickEntities(World.java:11

89)

16:47:55 [sEVERE]      at net.minecraft.server.MinecraftServer.w(MinecraftServe

r.java:559)

16:47:55 [sEVERE]      at net.minecraft.server.MinecraftServer.run(MinecraftSer

ver.java:457)

16:47:55 [sEVERE]      at net.minecraft.server.ThreadServerApplication.run(Sour

ceFile:492)

16:47:55 [sEVERE] Caused by: java.lang.NoSuchMethodException: ic2.common.TileEnt

ityNuclearReactor.tickRate()

16:47:55 [sEVERE]      at java.lang.Class.getMethod(Unknown Source)

16:47:55 [sEVERE]      at nuclearcontrol.NuclearHelper.getTickRateMethod(Nuclea

rHelper.java:128)

16:47:55 [sEVERE]      at nuclearcontrol.NuclearHelper.getReactorTickRate(Nucle

arHelper.java:300)

16:47:55 [sEVERE]      ... 7 more

16:47:55 [sEVERE] Unexpected exception

java.lang.RuntimeException: java.lang.NoSuchMethodException: ic2.common.TileEnti

tyNuclearReactor.tickRate()

        at nuclearcontrol.NuclearHelper.getReactorTickRate(NuclearHelper.java:30

4)

        at nuclearcontrol.TileEntityRemoteThermo.checkStatus(TileEntityRemoteThe

rmo.java:101)

        at nuclearcontrol.TileEntityIC2Thermo.q_(TileEntityIC2Thermo.java:244)

        at nuclearcontrol.TileEntityRemoteThermo.q_(TileEntityRemoteThermo.java:

237)

        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)

Caused by: java.lang.NoSuchMethodException: ic2.common.TileEntityNuclearReactor.

tickRate()

        at java.lang.Class.getMethod(Unknown Source)

        at nuclearcontrol.NuclearHelper.getTickRateMethod(NuclearHelper.java:128

)

        at nuclearcontrol.NuclearHelper.getReactorTickRate(NuclearHelper.java:30

0)

        ... 7 more

There we go. If you can help out at all, that'd be great.