Hey, what type of crate are you using? I found that mine do not like to be in the little "pet taxi's" I will attach a similar to what I use. Idk if it will work but someone suggested it to me, and it works great!
I had problems with one of mine not wanting to go in the kennel, so
I put her favorite bed, toy and blanket in there. Left the door open (so she could come and go whenever). Now she has NO problem going in there, in fact i dont even have to tell her to go to the kennel. Might be worth a try!