I'm not sure if you have overcome this hurdle yet or not.... if you have.... that's great! If not, then I have a couple of suggestions that worked for me... When I crate trained Emma, my vet suggested that I actually feed her in her crate.... This way she learns to associate this space with positive things rather than only going in there while I'm gone. I found that by offering her food in there during mealtime, she got used to it a lot faster... Also, when I was weening her into her crate, I would put her in there for a few minutes at a time and as I worked the time up, I would sometimes go out the door, but sit just outside to see how long it took for her to quiet down.... You'd be surprised at how quickly they settle in... Although by the way they cry sometimes you'd think they're never going to stop... I even asked my downstairs neighbors and they claim to have never heard a thing... Either I have really forgiving neighbors or her crying wasn't as bad as I thought. Anyways, I hope you have already reached a solution, but if not, these tips may work.... Good Luck!
Emma- Female Brindle, 3/4 Boxer, 1/4 Lab mix. Natural ears, docked tail.