Question
The leaves are shriveling, becoming limp.  It is getting filtered light, southern exposure.  Perhaps I am overwatering?

Answer
Becky,

If you are watering when the soil has dried out, then you are ok. However, if the soil is still moist when you water, then you are over watering. If you have been over watering, stop. When you resume watering after the soil is dry, add some "Superthrive" to the water (it is available at most nurseries and Home Depot. It should help you plant recover as long as it isn't too damaged. Hope this helps.

Sincerely,

Greg