Taz did the same thing to me when I first started feeding him in his feeding bin, which is now a huge rubbermaid storage thing. He'd try to jump or climb out and wanted notihng to do with the crickets. But after a day of refusing to feed him anywhere else, he started getting the idea. I didn't put him in the feeding tub, so much as I put him on my hand and lowered it into the tub. He watched the crickets for a while (growing more hungry all the time, I'm sure!) and when he was ready hopped off my hand and started eating. I had to do this a few times, but now he's fine with it. It just takes time. The crickets in his enclosure might be a problem down the road, but if you're sure you want to keep going feeding him in the cage, you can try a thick line of petrolium jelly/vasaline around the top. The crickets can't climb past that I don't think. Now if they're jumping up past the line... sorry, I have no ideas for that one!