big dig crashing at start

[jclu13]

ive never been able to get it started but now im getting a different error so i thought it might be fixable

Failed to start game cpw.mods.fml.common.LoaderException: java.lang.NoSuchMethodError: mekanism.api.InfuseRegistry.registerInfuseType(Lmekanism/api/InfuseType;)V

[dark_hunter]

OS? Modpack version? We need more info man.