Don't sweat it yet. Sometimes, even when husbandry is spot on, it still takes time.

It could also be the prey, the preparation of the prey, etc... Some BPs are finicky, so we need to try different feeding techniques and do what works for that specific animal once we have it figured out. For example, My BP, Tyson, will only eat if I defrost straight from the freezer and feed him immediately. If I thaw overnight, or thaw any other way, he won't eat. So I do what works for him, and he eats regularly...for now...