A lot of experienced breeders leave at least 4-6 weeks between hatching and the first food offering, this makes sure they are pretty hungry and they don't waste time endlessly offering food when the snake probably has a lot of yolk to absorb first. It won't do it any harm at all to leave it that long. Fuzzy mice are far more attrractive to carpets of all kinds too - pinky mice often elict a poor response, and carpets are well able to cope with the size..
Leave it another 2-3 weeks and try again, even then you won't have to consider force-feeding for a further couple of months more. Don't pester the snake with food - you'll set up a negative association which will make it more resistant to feeding.
Jamie