My brand new P4 straight out of the box has the forward vision sensor error. So I downloaded the assistant 2 software for PC on a windows 7 machine and it will not recognize my P4. I've followed all of the instructions on the DJI video but for some reason my PC will not recognize? As far as I know, all of the drivers were installed at the time of the software download. Any help would be much appreciated as I've been flying without the avoidance sensors working.