"UPDATE:
I went out and bought a micro USB cable from Arduino, and it works!! I guess there is something extra in the cable that isn't included in all micro USB cables. "
I bought an APM 2.6 earlier this month and have not been able to connect it to my computer to download the firmware. I downloaded the latest version of Mission Planner, as well as the USB Drivers to connect it to my laptop. When I go to add the new…