Try live for a few feeding so you know he's getting some kind of meal, then try pre-killed for a few feedings, then try going to f/t. That's the way I've had to switch over a problem feeder to f/t. Also, I feed him smaller meals than he should be eating, so I know he's got food in him, but he's still a bit hungry.
EDIT: Also, definitely do not offer food every day. This will just stress him out even more, and it will make him fear feeding time. I only offer each feeding day, which is every five days.