Using a snaffle bit at the walk focus on when her left front hoof leaves the ground. Tell yourself "now, now". You will have a light contact with her mouth. When her hoof leaves the ground barely turn her head for the one stride and allow her to straighten. As that hoof leaves the ground it will also step sideways a little. Try walking a few steps and repeating each few steps. She should begin dropping her nose which means she is softening. Don't ask for faster gaits at this time as she needs to learn to soften first.