How have you introduced the crate to her? Putting her into the crate for 3 hours and expecting her to like it isn't going to get the best results
I'd suggest crating her while you are at home and use the crate as a positive thing. Feed her in the crate. Give only the super best treats in her crate (like a frozen stuffed Kong). Do 15 minutes at a time.
For a 10 year old dog who has NEVER been crated before, you have your work cut out for you.
Why do you think it's best to crate? Is she destructive at home? If you can't crate, can you keep her in a bedroom with a door shut, or something?