
At night try covering the crate with a blanket, just leave the door without cover. Sometimes they feel insecure and vunerable in a crate and the blanket can help make it into a den. Make sure there is some cuddly bedding in there too.
I personally would put her in at night, make sure she is tired when you go to bed and during the day at the moment I would use a stair gate on the connecting door.
Some take to crates better then others, but it is not unreasonable to expect her to sleep in it at night, but it might be too much for her being shut in during the day. As she grows used to it, then you can introduce it for very short periods during the day.
Hope this helps
Sandra