Joan,
I think the problem is the dark image.? The frames need to be exposed.? ?Hristo has some notes here:?http://www.hristopavlov.net/OccuRec/IntegrationDetection.html
The WAT910HX/RC settings are the number of fields (not frames)?? x2 fields = 1 frame, and x8 fields = 4 frames.?? So when the calibration asks for 4 frames then set the camera control to x8.?
Im sure someone will jump in if i'm incorrect.
Tim
Tim Haymes