Phantom 2:  Flies well only if I hold the throttle up.  Indicator lights flashing red all the time even though freshly charged battery.  Flies 15-20 minutes but won't hover unless throttle is continually held up - otherwise it lands itself.  I thought there was some software such that I could connect drone to computer and adjust things, but can't find it anywhere online (so far).   

Thanks for any clues.

Phantom 2:  Flies well only if I hold the throttle up.  Indicator lights flashing red all the time even though freshly charged battery.  Flies 15-20 minutes but won't hover unless throttle is continually held up - otherwise it lands itself.  I thought there was some software such that I could connect drone to computer and adjust things, but can't find it anywhere online (so far).   

Thanks for any clues.