As much as I prefer f/t, in this case I would try a live feeding just to make sure the snake eats. The adults can go for much longer without food, but this being a baby I would worry too much.

How are you thawing out the frozen food? Are you warming it up at all?
I bought a pair of axanthic babies last month, both were 60 grams when they arrived, and both were fed live. Their first feeding with me (both within a week of arrival) was f/t and they've been on f/t since. *So far* all of my snakes have been happy to take f/t, but I don't just thaw it out, I let it warm up under a heat lamp until it resembles the body temperature of a live rodent. My snakes also seem to have had a higher feeding response since I've moved them into the same room where I keep my pet rats and rabbits. Smelling "food" all the time really seems to help perk their appetites!