Hi guys, Im Ruben from portugal, im in panic with my Dji Phantom. Everything is updated and calibrated in my phantom and when I start flying the green leds are showing that everything is okay! But when im flying sometimes as it stops blinking green and starts blinking yellow and red and starts to fly alone or begins to pull in one direction for a few seconds and than returns flashing green. What should I do to solve this problem? Tks!!!