I have an S-TEC 60-2 autopilot with Altitude Preselect and GPSS hooked up to a Garmin 530W. My question is - - can this autopilot fly a GPS Waas approach, an LPV approach, and track the GP? I can't get it to do it, it flies the ILS GP perfectly but I can't get it to fly the GP on the GPS Waas approach. Am I doing something wrong or does it simply not have the capability? If it can fly the GP on an LPV approach, what mode do I set the autopilot on as I activate the approach? What mode is the GPSS to be set on? Any help will be much appreciated.