After you send her around a couple times, don't ask her to come to a complete stop. When you are done driving her forward and want her to come in to you back away from her. She should turn her hip away and her head towards you, ears forward, curious. Reward the slightest try. If she takes one step forward, praise, praise, praise. IF she totally ignores you, drive her forward more. Then try again.
You have to pay very close attention to her body language AND yours. Be very specific with your movements and very consistent. Some horses are so sensitive that if you lean forward slightly without even moving your feet they will move off. Play around with her in the pen and see how much of your energy it takes to move her off or draw her in. Start with little subtle movements that you can build on/increase if you need to. If you start off too strong, you have no where to go if they don't comply. If you start off softly, she can respond softly; or you can increase the pressure as needed.