I bought a cable and installed the software. The first thing it asks to do is test and save the communications port although it does not seem to recognise any available port.

When I plug the cable into the USB port, the Windows "ding" indicates that it recongnises the cable, and the red LED illuminates on the VAG-COM.

Is there any sequence that I should follow such as plug into car, then laptop, then turn on ignition etc?

Cheers.