On a more serious note, do you know her history? How old is she? What methods have you already tried?
When we got Mario, it was evident he was abused by his previous owners. I spent two weeks only going over the in the door, out the door training, and everything else we did was simply to build trust and for him to have fun. Once he trusted me, his training became fast and fun. However, Mario is a major people pleaser.
Try this site and see if anything works or if you have tried it all already. It is free and offers some troubleshooting tips as well:
Introduction | Mind to Mind