That is terrific. It just takes time. When I first got Biscuit 9 months ago he was scared of everything...not really because he was spooky but because the trainer had been so harsh with him...he was always waiting for the whip to come out. When I would put the saddle blanket on him he would flinch so hard it was sad to watch. He was head shy and if something touched his haunches he'd scoot up so fast you'd swear the devil was on his tail.
Now, 9 months later to the day (ha! I just realized I took possession of him exactly 9 months ago today) he isn't scared of the saddle blanket, he can still be a little sensitive about his head but he has done a 180...he never was spooky on the trail...just spooky of people and their motives.
Give her time and attention, move slowly and smoothly around her and she will most likely calm down when she realizes you aren't going to hurt her.
Biscuit was scared to death and would stiffen when I'd hug him...he had no idea as to why a person would do that or pet him. Now, he is looking for a hug and most likely a treat.