Honestly, I would try feeding a live hopper mouse to jump start the feeding response. It is important to get food into that snake. As the others have said, do not handle your snake until he's eaten at least 3 consecutive times.
You can go back to F/T once the snake is an established feeder.
If it's a shy snake, you can darkern the tub to make him feel more secure or add more clutter in the tub.

Good luck