Upgraded my Phantom Vision 2+ firmware this past weekend and tried to upgrade the RC but the pc keeps telling me to "please connect to the controller". It is connected and I have tried several different USB ports and even changed cables. Same results. Now the Phantom won't reach high enough RPM's to take off. Have a solid yellow light on the controller which is supposed to mean needs calibration but still get the same error message when I try to calibrate. I was thinking it was possibly a Windows driver issue but we have connected the Phantom and RC to this same home desktop pc for months now. Help !!!