develop app using et51

Hello! We are upgrading from et50 to et51 tablets and I am having trouble connecting et51 tablets to our laptops for development. I purchased a usb-c to a usb-a cable and plug the usb-c end to the device and the usb-a to the laptop but the laptop does not recognize the plugged in et51 device. Am I using the right cable? Any ideas? thanks.