You've had the snake a month, so call whoever you got it from and ask what they were feeding it.
It could be as simple as scenting your preferred food offering with what the new guy is familiar with.
Also, if using F/T or pre-killed try a late evening feed and if he doesn't hit the warmed food leave it and him alone in the darkened room for 30-60 minutes. Curiosity got my ghost started on his food and not he hits like a hammer on feeding day.