I agree with what's been said so far about getting the temps right. I can almost guarantee you will have to set the tstat higher than 82F (unless it's calibrated wrong). Covering the top of the tank is a great idea, also (assuming it's screen). The only other thing I will add is that just the stress of moving to a bigger enclosure is enough to put many BPs off feed. Keep in mind that they live underground in termite mounds in the wild. They really prefer small, dark spaces, which is why they tend to do so well in racks. In addition to fixing the temps, you may want to consider covering at least 3 sides of the tank with something to black them out or covering the whole thing with a blanket. That can be a big help. Also, how/when are you offering food? I'd recommend feeding at night with the lights out, and feeding in the enclosure if you are not doing that already.