A nice tip that worked for me was to defrost the mouse almost all the way, then place it in a plastic container with holes in it and put that in your BP's enclosure. Let it thaw out for about another hour and this will get the BP into hunting mode. Then I took the mouse out and blasted it with a hairdryer to warm it up, dangled it in front of my little guy and BAM he took it! And I had heard he was a problem feeder from the store I got him from. So I'd definitely suggest pre-scenting the room.
I also feed him when its dark out, leave the lights off in the room and only turn on the red lamp so I can see. I think this probably makes him feel more comfortable. Also, if your BP doesnt strike you can try leaving the (f/t) mouse in there for a little while and leave him alone and he may eat it himself.