If she goes in on her own she okay with it...where did she come from?
My pup mill rescue went into a crate fine but shook, whined and was terrified in it...
open the door and back up fast...dropping treats...then working up with only positive reinforcement if not
Then try a play pen instead see if that helps...I personally recommend a 4'x4' area.
At my house we have a rule if the dogs are on their bed no one bothers them, no touching, period, no exceptions guests are asked to respect it as well. Their bed is their safety zone if they want attention then get up and come to us...of course my puppy figured out she could use her bed as base after eating my shoes she'd run to her bed and wag her tail at me...but I still left her there and alone...no doggy time out. Same dog loves her "box" she goes to it to rest-there's a bed in it and we no longer have to shut the door at night, she knows to go to bed in her box.Your dog may also be territorial hard to tell consult a behaviorist. May be fear aggression or territorial...?

She might just need behavior modification training so that she learns that she has a firm but very loving leader and has no need to feel territorial about any place in the home. She should not be in control of the crate or anything in your house - you should, as should all members of the family. Really, agressive behavior should not be permitted and allowing her to possess her crate could be dangerous as children can get curious or challenged by a territorial dog and, even when told not to, may reach into a dog's crate and get bitten. Since you probably don't know what kind of life or treatment she had before you got her, she may be regressing to behavior she learned in her former home. If you are not experienced in dealing with dog behavior correction through behavior modification with positive reinforcement, maybe you could do some research and find an experienced trainer to give you some advice on how to proceed. I would not "treat" her when first arriving for now as she may see that she is getting rewarded for her unstable behavior. With a little guidance from a good trainer and a lot of love and regular work with your little dog, you and your family can help this fearful sounding girl learn how to be a stable and happy dog. Best of luck with her.

If you have a iphone, they have an app that will allow you to watch your little one with a webcam to see if there is anything going on when you are not there that maybe causing so much anxiety when you come home. I have a webcam setup at home to monitor Brandi but she mostly just sleeps so I don't watch as often as I used to but it help me to determined if she has separation anxiety which I am happy to say she doesn't. I swear she falls asleep as soon as I walk out the door.

I actually found her in our local classifieds. Apparently, the wife of the couple that was getting rid of their dogs just had knee surgery on both of her knees and so she was unable to care for them anymore while her husband went to work.
We bought Calliope's kennel and she went in it fine, in fact the first couple of days she rarely came out she just observed us.
Her previous owner's I think trained her pretty well, she's not very territorial about food, about toys, about her special beds throughout the house, and I don't get the sense that she is territorial about her kennel. She is pretty good at listening, when we tell her "no" she stops what she is doing and will go about something else. It's only when we've been gone a couple of hours and leave her in the crate that she reacts this way, scared, growling, about to attack. Umm...like I said, she does the attack position on her toys, but she is not shaky scared with us throughout the weekdays when she is out. And she sleeps fine in her kennel at night, that is aprrox. 7 hrs. and she comes out in the morning happy. So, I'm figuring it's not staying in her kennel for long periods of time that is causing her to react this way because she stays in there throughout the day 2-3hrs. to sleep or just chill, when we are home. I think it has something to do with us leaving her alone for those couple of hours.
Like yorkietalkjilly pointed out, I don't know what kind of life she had. I'm thinking that Calliope was taken care of and trained early on as a puppy because she knows not to chew on things that aren't hers, she was potty trained, she knows simple commands, and knows how to stay in a kennel. But, I have a feeling that after the wife had surgery that the dog was neglected. The husband informed me that he had to leave the dogs while at work and that's why he wanted to quickly rehome their dogs.