It's also not a good thing to constantly badger your snake to eat. Trying once a week is fine unless your pet is severely malnourished. If that's the case then force feeding may be an option, but I would only let a vet do that so as not to injure your snake.
By trying day after day to feed your snake, you are causing him even more stress, which in turn will prevent him from eating for an even longer period of time. It turns into an endless, viscious cycle. Once a week trying to feed is best. That way if he doesn't feed he has a week to work ono adjusting himself to his surroundings and getting himself back on a decent feeding schedule.