Your question is a noob one and will likely be moved to the noob questions. Check device manager when you plug in the OBD to your PC. Do a screenshot of what it shows up as and upload here. Did you buy a Chinese clone? If so post the link. Check your wiring from ECU to OBD. Service manual/diagram is usually good for that. Did your OBD device work in the car at all?
i did try an ME7.5 pulled from an Audi, that worked fine on vcds on bench.. but not on defmoto. my cable in an clone, not genuine, i made an order of two different dumb cables with and FTDI chip included, maybe that will change my situation..
pinout found on google, that should be fine.. mesured all connections to, all fine.
i will report as soon cables are arrived and im back to my garage bench