I know of a few feeding tricks ^^ By the way ASF is African soft furred rats :3
Get a needle, a Tupperware box, a rag, a cup, frozen pinks and some very hot water.
Put the frozen pinks in the water until they are very hot to mimic live mouse temps and stab the needle through the mouse's head. Place the pinkie in the box (POKE AIR HOLES WITH THE NEEDLE) and put your reluctant feeder in. Put the Tupperware box in a closet or dark quiet room with the rag over the box. I would check every hour or so to see if it has eaten. If not, just heat it up and put it back in!
Try this every 5 days if he doesn't eat and if this fails, you may have to force feed those rat tails.
Good luck and keep us posted