OK, I got a new Phantom for Christmas, put it all together and it flies great. So I want to enable IOC, right? I download the DJI Driver and NAZAM_2.20 installer and hook everything up. The software won't let me go to the other screens and it says "DJI NAZA-M Firmware 4.02 has been released. Please upgrade the NAZA-M Firmware to v4.02 using the Assistant Software v2.20. Important: 1. Make sure to reconfigure all parameters and recalibrate the transmitter in the Assistant Software after upgrading the firmware. 2. For the PHANTOM users, please download the Phantom Default Configuration Parameters...and upload them to the Main Controller in the Assistant Software, then reconfigure all parameters and recalibrate the transmitter." So I upgrade the firmware and immediately I get an ERROR  "GPS not calibrated, or magnetic field interference. Please calibrate GPS again in good condition." I download the default parameters. The Phantom just gives a rapid blinking (I think amber) light and it doesn't appear that the transmitter is connecting anymore. I try the Transmitter Calibration process in the Advanced Manual, but I don't get the single beep and nothing changes. I have checked the IMU and it is OK. The compass values are X:210 Y:184 Z:322 Mod:424. At the bottom of the screen it shows Mode: failsafe and MC OUTPUT: off Help, Please! Mike Bush Fort Worth, TX OK, after much searching I discovered that the V1.1 Phantom uses the D-Bus receiver type, not the PPM. Once that was sorted out, everything was fine. MODS: I apologize, this should have been in the HELP section.