You at least have to update the firmware on your DMS to work with an Audi box. Once upon a time, that could be done from within the Phatnoise software, but not anymore. It can be done using VorTechS' Windows DMS Tools. If you are not sure which firmware is on the Audi box, you may want to flash the box with the latest firmware as well. That can also be done from the DMS Tools. Download the tools, and it should be fairly self-explanatory. (Just be sure to follow the procedure in your Phatbox manual for updating the firmware.)