Oh, and since I guess your question didn't get answered: a lot of people recommend that you leave your new snake alone for at least a week before trying to feed it. Let it acclimate. You're already sort of rushing the process. BPs can go quite awhile without eating and be perfectly fine. Repeatedly offering prey after refusal will just stress or annoy, um, fartbarf. Wait a few days, at least. I'm not an expert but that's what I've been told BY experts and it's worked for me.
He's not eating because he's not acclimated yet and his enclosure is WAY too big for him.
Also, I just saw that Deborah already posted her thread. Oh well, it's worth a double post. Also read the FAQs and the caresheet stickies on the top of this forum and the Husbandry forum, if you haven't already. In fact, reading through the Husbandry forum is a good idea regardless.