Good luck with feeding Axel. Like the others have said, keep offering food every 7-10 days until he catches on. Snakes can go long periods without food but he will eat eventually. You might want to consider changing your hides and adding a little more clutter to your tank to give the snake a stronger sense of security. Reptile Basics makes some pretty functional hides. Also, is your heat source regulated with a thermostat?
http://www.reptilebasics.com/hide-boxes