I have the vag cable to usb and I can get the computer to see the port but cant get it to see the interface.
I have no Idea what I need to do to get this to work.
eney help would be good.

 

Not sure you will get much help. What software are you using?

 

I had the same problem.

When you test the cable, it has to be plugged into the car and the key has to be turned to the run position (first click toward the front of the car). Try that. If that doesn't work email the person you bought it from.

Also check the device manager in windows to see if the cable was installed as a USB device or a COM port device. Many of the non Ross-Tech USB cables use a driver that acts as a COM port emulator (meaning the cable plugs into the USB port but the computer thinks its plugged into a COM port). This is why you need to check the device manager.