GPS Problem? Went outside to try to fly around my house, but I could not get the bird to flash green. My iPhone had the GPS signal either greyed out or it went up to a max of six and then went back to grey. Does it just show grey when you have less than six or is something wrong with my new bird? We have lots of big trees all around the property, but my portable gps in my car can usually pick up signals. When I went to the ground station part of the app it was only showing 3 signals and briefly 4 signals. I guess I will never be able to fly at my house?