So it works on ROMRaider, but ECUFlash 1.42 doesn't detect it? If ROMRaider detects it and it works there, the drivers are installed. It's just that they may be incompatible drivers with that version of ECUFlash. My guess is that the firmware has been upgraded to the latest beta, by ROMRaider, but I can't be sure.
Do this at your own risk, but I suggest trying the ECUFlash 1.43 beta (get it from here:
http://www.evoscan.com/ecuflash/ecuflas ... 52_win.exe). It should update the OP2 drivers for you and the firmware. Works for me.