Hang a bell from the door. Praise her for ringing the bell and go outside with her until she potties. More praise. If you see the potty signs in the house, bump her nose on the bell on the way out and praise her.
A friend of mine trains the guys that train the military bite dogs says a dog has at most a 2-3 second memory. If you don't catch them within this time they don't know what they are being praised or punished for. A clicker will extend this for a few more seconds but overall you need to catch them pooping in the house before punishment actually does any good. The same for rewards outside.
