I have a new albino lavender female. She was a little tricky to start. Here's what works for me.
Make sure you have the right set up. A baby should be in a relatively small enclosure, equipped with a hide, in a quiet, dimly lit area. I don't like a lamp on top of an enclosure as I think snakes equate overhead light with being exposed which makes them feel insecure. Make sure the new acquisition has had a minimum of five days (a full week is better) to settle in...no handling, no feeding attempts. Check on the snake each evening about half an hour after dark. If the snake is starting to leave the hide and explore the enclosure, it is ready to feed.
For the first feeding, bring a f/t rat pup up to live temperature. (the rat should feel warm to your touch) Using tongs or forceps, dangle the rat near the snake. If the snake ignores the rat, bump the snake with the rat. DO NOT smack the snake in the face with the rat. You want to entice, not intimidate. If, after a few minutes, the snake does not take the rat, leave it near the snake, close the enclosure, turn out the lights, and leave the snake alone with the rat over night. If the snake has still not taken the rat by the next morning, remove the rat and discard.
Wait a minimum if three days before attempting to feed again, using the same method above. It took me thee attempts to get my girl to feed. Since then she has not missed a meal and is showing a stronger feeding response with each susbsequent feeding. At her latest feeding she nearly came out of the he tub after the rat!
Good luck with your baby. It is the rare retic that starves itself.