Been messsing with this in my limited free time for a few days-now I have some time off and need help: I've copied/downloaded the latest firmware update for my P3P on two different microSD cards, uninstalled the downloads of my laptop and PC, reinstalled on the SD card, etc. but I can't get the Phantom to start the update. Nothing happens when I put the card in the gimbal and start the drone - just sits there and flashes yellow LEDs at me, and the gimbal light stays solid green. Previous upgrades didn't have problems. Help!?