I have a P3S copter with the latest firmware, a 7" android tablet running ver. 4.4.2 software, and DJI go ver. 2.4.0. I have a GPS lock, the multiple flight mode enabled, the RH switch in the F position, and the bird at 60'. I can not enable IOC (it's grayed out) and I can't get the bird to follow me. Can someone help me on this? Thanks. Jim B.