Wow... Did this thread ever go OT. Sorry original poster, people tend to get a little overzealous on this issue.

Have you tried leaving the f/t item in the tub with the snake for a while? I just got a new enchi and she refused to eat while I was in the room.. she'd even defense-strike the prey item but not coil. I hazarded leaving it in with her one night and she ate it when I wasn't in the room. Apparently, she's a shy eater.

Good luck, I know how anxious it can make you when your snake doesn't feed for a long period of time (and is loosing weight). My problem snake is a hognose that has been on / off feed for a long time now.