Second USB cable not working properly

[KSDiesel]

Ive noticed this as well. the reason why you are having issues is due to the ZLINK, you cannot have the zlink APP running in the backround. please close all running applications and try both usb's again. ZLINK has priority over the USB's . view my video for a better explination. i have it in there.; https://www.youtube.com/watch?v=SFkjYUiMUOQ