Interface not found

Tried to scan an 02 Beetle. Did a test intending to save usb. Said interface not found. Updated to latest version of VAGCOM. Still says interface not found. Uninstalled software and reinstalled. Still interface not found. Never had this problem before.

What brand of computer? What version of Windows? The device that plugs up to the car, what does ALL of the writing on it say?

make sure "key in ignition & on position". Dashboard should light up. car don't need to be running.~ don't ask me how i know.