Your temps are quite high. Ambient temps should be 78-85 and the ends should not be 24/7. Typically accepted temps would be 80ºF cool side 90ºF warm side and ambients around 80ºF. 88/92 especially for a small snake is far too warm. Often I recommend for sub 600gm animals a warm side of 88ºF no warmer. It is easily possible the snake is too warm. Too warm or too cool the snakes cannot digest food so they will not eat.

some good care sheets...
http://ball-pythons.net/forums/showt...ius)-Caresheet
http://vpi.com/publications/the_ball_python_care_sheet