"Almost a week" is a relatively short time really. Don't worry, just let the little one settle in some more, don't fuss with it over a lot of handling, doublecheck your temps, humidity, hides, etc. are just right and try again next week.

In the meantime you can research here on our many threads chock full of suggestions for getting young snakes to take their first feeding with a new owner. If you aren't sure about anything, please don't hesitate to ask so you can be prepared for next week's try.