I know your pain, when I first got my Dum I had to go through all sorts of stuff to get it eating. And it can still be touch and go from time to time. Fortunately I have him switched to frozen thawed and now just toss a rat in and leave it over night. 98% of the time when I check in the morning it is gone. If he doesn't eat, I try again in a week or so. In the early stages I was feeding live, at dusk (I wanted to be able to get a speedy rat removal if things took a turn for the worse, so I made sure I coudl see well enough to watch) and if he struck at all, I was quick to grab the rat, kill it and then tease him enough to make him mad enough to strike again. Then just leave the rat in with him, and leave the room he usually ate. I have had my Dum for almost 3 years now, and he still goes on hunger strike from time to time....as long as he looks healthy, and isn't losing weight I don't worry too much, and offer a meal from time to time. Last year he went off feed for 6 months, He never lost any weight (visiably anyway) and one day I offerd up a rat...and bang he was eating again. It can get frustrating and a bit worrysome, thus far I have not had to force feed to save him. One suggestion I have...I did notice when his enclosure was out in the main living space of the house, with all the activity it was a tough deal to get him eating. I moved his set up (because my girlfriend said it could no long live on the kitchen table...he he he) I built a bench in the basement and set him up down there. There is much less activity and movement around his enclosure, not sure if this helped, but he sure seems to eat better and more regularly since the relocation. I'm sure there and many folks here that can help...I know i have learned a lot just form reading these forums. Best of luck to you and your snake....Feel free to e-mail if you need more specifics.
-Matt