1) MotecAdd works only with the version original of rfactor.exe 1255. NOT with the NO-CD.
2) Start rFactor_Config.exe and check that you chose "DirectX 9" (and not DX7 or DX8…)
3) Start the game, load a track, and press ALT+TAB to see the MotecAdd-SERVER, the 3 LEDs must be FIXED green (ie: Game found, Local racer name found, Slot racer name found).
4) Your anti-virus can block the communication between the server and DLL DX...
5) If you change the PORT on the server, don't forget to also change it in the file RF1255_MotecAdd_DX_Config.ini (ServerPort=3785)
6) On some routers it