I am having trouble connecting my P2V+ to the desktop software. One end of the cable is connected to the controller, the controller shows a green power light (with four green batter status lights on) and the other end of the cable is connected to the computer and the 3.6 software is running. The software window shows a blue and a red button on the lower right edge but no connection. Clicking the PHANTOM button on the top right if the window gets me the message "Please connect the controller!" What could I be doing wrong??