Okay, so what are your temps? Like Becky reminded me, the warmer the temps the greater the feeding response ;)
Also, do you pre-scent? If not, you ought to since this gets them in hunt mode!
Do you have a gram scale to weigh him? I'm guessing that this snake may not have eaten and so I would suggest feeding only live and mice to start.
Also, I strongly suggest putting this guy into a tub for now; a small and cramped place for him. Later, you can change him out into the tank you have.
How does this sound to you?