I had a similar problem with Dixie when I bought her. I asked the folks I got her from if she was eating live or pre-killed, and they told me she was eating live. I assumed from her size that they meant rats, but when I offered her a live rat, she seemed more intimidated by it than appetized. I offered her a pre-killed. No interest. I offered her a F/T mouse. No interest.

We visited a new pet shop in town that had a special on mice for something like 69 cents. I decided "What the heck; if Dixie won't eat it, Phil or Magellan certainly will!" I bought one live mouse and dropped it in her enclosure. BAM! She took it with so little hesitation it wasn't funny. A week later I offered her another, and same thing.

This week I picked up a live small rat, and had the shop bag it with some used mouse bedding. She took it as well.

If you can get a hold of the people you got your BP from, try and find out what exactly they had been feeding it. BP's are commonly fed rats and mice, but in the wild they may eat gerbils or other small rodents. If yours was fed gerbils, the smell of rats or mice may not trigger the feeding response. Some snakes, such as king snakes, are pretty much "eat anything that doesn't eat them first", but BP's are much more selective. You may just need to figure out what yours associates with food.

Good luck, and keep us posted!