Single Player Troubles

[dzVince]

I've been having recent problems opening up singleplayer on the modpack Mindcrack.
I get this error below, can anyone help? I tryed deleting my mindcrack folder and reinstalling but that didn't help much either.
2013-04-17 07:58:54 [SEVERE] [ForgeModLoader] The ForgeModLoader state engine has become corrupted. Probably, a state was missed by and invalid modification to a base classForgeModLoader depends on. This is a critical error and not recoverable. Investigate any modifications to base classes outside ofForgeModLoader, especially Optifine, to see if there are fixes available.
2013-04-17 07:58:54 [INFO] [STDERR] Exception in thread "Server thread" java.lang.RuntimeException: The ForgeModLoader state engine is invalid
2013-04-17 07:58:54 [INFO] [STDERR] at cpw.mods.fml.common.LoadController.transition(LoadController.java:122)
2013-04-17 07:58:54 [INFO] [STDERR] at cpw.mods.fml.common.Loader.serverStopped(Loader.java:780)
2013-04-17 07:58:54 [INFO] [STDERR] at cpw.mods.fml.common.FMLCommonHandler.handleServerStopped(FMLCommonHandler.java:469)
2013-04-17 07:58:54 [INFO] [STDERR] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:559)
2013-04-17 07:58:54 [INFO] [STDERR] at fy.run(SourceFile:849)
2013-04-17 07:58:55 [INFO] [STDOUT] Author: Paul Lamb, www.paulscode.com

 

[Belone]

Have you added any other mods or changed any mods in the Mindcrack pack?

 

[Lambert2191]

http://forum.feed-the-beast.com/categories/support.110/

instead of just pasting it here, use pastebin. Then paste the LINK to your pastebin on a new thread in the support section of the forum.