SkyX and SBIG RGH

Sold an STL 11000M to a friend and helping him set it up.  He has SkyX with camera add on.  Camera connects fine but the RGH is not being recognised.  Keeps using internal guide chip.  instructions say that if RGH is connected, it will be used as guide camera.  It does work in CCDOPS, however, so the camera is functional.  There must be some setting in Skyx Im missing.  

Thanks,

Sidney