Railcraft Crash at start up

[querky]

Launcher/pack Version: 2.1.1

Operating System: Mac OS X Snow Leopard

Version of Java: 1.6.0_29 from Apple Inc

Description of Problem: Railcraft Crashing at start up

Error Messages:

--- BEGIN ERROR REPORT d7f296a1 --------

Generated 3/11/12 10:46 AM

Minecraft: Minecraft 1.1

OS: Mac OS X (x86_64) version 10.6.8

Java: 1.6.0_29, Apple Inc.

VM: Java HotSpot 64-Bit Server VM (mixed mode), Apple Inc.

LWJGL: 2.4.2

OpenGL: NVIDIA GeForce 9400 OpenGL Engine version 2.1 NVIDIA-1.6.36, NVIDIA Corporation

RailcraftInstallationException: Railcraft Client 3.2.1: Invalid Network Entity ID!

************************************************************************************

There was an issue assigning entity network IDs.

"net.entity.cart.bore = 124" is invalid or used by another entity.

Please adjust your railcraft.cfg file.

************************************************************************************

--- END ERROR REPORT 1d3f85d1 ----------

Link to pastebin of log:-

I've tried changing the Bore's ID to something else but no joy, I still get this error message.

Could anyone help me with this issue?