Checkout these 2 threads, they go over the basics:
http://ball-pythons.net/forums/showt...ius)-Caresheet
http://ball-pythons.net/forums/showt...t-Thermometers
I would say that you are feeding rodents that are too small, that would account for the lack of poop, and shed. Almost all BP's can eat mouse hoppers right out of the egg, and they quickly need larger rodents.