Sorry, should have specified. It's XP (SP2) with .net framework 2.0 + SP1 installed.
I've got the USB drivers installed, and I've tried using the FTDI setup and also directly setting the COM port.
I've tried it on 3 machines so far (2 laptops connected to the car, and 1 desktop disconnected). Each machine gives the same error.
I'm using the latest version of the Alfadiag demo software (I'm not buying till I know it works!!)
I didn't have any issues with setting up the cable, plugged in, used the drivers, it set up fine. I've also tried downloading a different copy of the drivers but to no avail.
Given that it shows the same error when connected or disconnected, it just looks like it's not making any communication with the cable, and definitely not wth the car. I'm not sure does that indicated it's a problem with the software or with the cable.
I've still had no response from Alfadiag
Sorry, bit of a head-scratcher.
Anybody know any other software that will perform a similar function?