Well, you say you have the correct habitat, but what are the temps, humidity, how do you read them, how many hides...describe the cage/tank/tub. There are three reasons she could not be eating just off the top of my head. You didn't give her any time to adjust, aka leaving her alone for a week. You are trying to feed her too often. Her husbandry may not necessarily be correct.
Ball pythons can go off feed for months without a problem, 1 week isn't going to hurt her. If we can find the reason and correct it, then hopefully she won't give you too much hassle.