Did he take the food when you assist fed? It seems like you've tried a whole bunch of things in a very short period of time which can be really stressful.
I'd put him into a small tub and leave him be for a week or two and try with an appropriately sized live prey.
I'm having an issue with one of mine right now. Maybe you could check out my thread http://www.ball-pythons.net/forums/s...ad.php?t=68971 for Becky's suggestions; they seem to have applicability in your circumstance as well