I would say your BP maybe stress because of the new living situation. As long as the temps and everything else is right and it is not sick, just keep trying to feed it and keep an eye on it weight. If you don't have a digital scale might want to get one, got mine for around 40-50 dollars. Try a rat fuzzy, that way if not eaten soon you don't have to worry of it attacking your BP.
I had the same problem when I got my second BP. Tried feeding live, FK and FT and would not eat and would try and strike at anything that went near his setup. It took him almost 3 months before he calmed down and would eat and eat regularly. During the 3 months he only eat once. He was just under a year old and weighed around 550 gram when I got him.
Each BP have their own personality and their own way of eating sometimes. My older BP would not eat unless I use a hemostat to grab the rats tail and make it squeal. While the younger BP I have to set it in his setup so he can stalk it.
Hope everything works out with you.