To the OP....WHAT exactly are you offering your new BP as food? Everyone is correct in inquiring about your husbandry...but your issue may be the food itself.

Are you offering live or f/t? If you are offering live, what size? If you are offeringt f/t how are you offering it? F/t is not an easy meall to feed if you don't know what you're doing....my friend just got a BP and called me and said it wouldn't eat. I asked what she did to prepare to meal and she said "I thawed it out on the counter and then left it in the tank".........so I told her she had to heat it in HOT water, or with a blow dryer, get the temp upto 90-100 degrees....get a set of big tongs, and dangle the mouse, and make it look alive....her snake took it in 2 seconds.

Let us know what exactly you are offering as food and how you are offering it!