Sounds like you didn't heat it high enough--she might be missing because she's not getting the right heat signature.

Take it out, let her rest for an hour or so. Use a blow dryer and heat the mouse up (not HOT but warm to the touch), then when you "dance" it in front of her, just jiggle and wiggle it a little--sometimes if it "dances" too hard, she won't be able to catch it unless she's psychic and knows exactly where it's gonna bop next.

Also, not sure where you're located but it's usually better to feed them in the evenings when they tend to be more active.