Just to add to what minikiller has said, many cheats do not carry over to the next game eg .matteosartori. These need re-entering when you load a saved game. Sometimes they are really stubborn and won't reactivate, all you need to do to fix this is to go to the next turn and try again. I think .worksundays. needs the build queues emptying before it will work, but I'm not sure about this as I only use the reveal map code.