So here's a theory i tested, so far he seems a bit timid, take him out and let him sit in your hand for a while, eventually he'll see you wont hurt him and begin to explore, once this happens put him in the enclosure and try feeding him.... maybe the prey size is too small or too large. try him with hoppers depending on his size they are candy for babies.

I hatched my first clutch [Normals] this year and hoppers did the trick to get them eating. Tell us how it goes.