LaserSoft Imaging

I'm having a problem with Silverfast AI 5.5(photoshop plugin - haven't tried the twain version yet) with a Polaroid SprintScan 4000, under Win2k. It works fine for a while, then I get the following weird behavior when I try to scan: it moves the carrier to the frame I want, then scans a small portion of the frame (carrier moves 1cm or so), then it reverses direction and apparently scans the same part of the frame again, moving the carrier back, then forward 1cm or so, then pauses for a fraction of a second, then moves forward and scans the next 1cm, reverses and scans it again, and so on. This process repeats for the full length of the frame, then it moves the carrier back to the beginning of the frame and repeats the whole process again! It will do this 4 or 5 times, then it finally stops, and imports a blank image into photoshop. Once this happens, it will continue to do this on subsequent scans until I reboot. It is as if it is trying to do a multi-pass scan, although my understanding is that the SS4000 version does not support that - could multi-pass mode somehow be getting turned on, even though there is no button with which to do so (and it doesn't work)? Has anyone else seen this behavior? I had the same problem with the 5.2 version that came with the scanner, but I hoped that 5.5 would fix it. It did not.

Any suggestions?

Technical details:

Win2k SP2
Silverfast Ai 5.5.1r08
Photoshop 5.02
SprintScan 4000 (1.3 firmware)
AMD Athlon 1.2GHz Processor
Advansys SCSI adapter (I forget the model# - if it matters, I can find out)
384 meg RAM

Jeff

The moving forward and backward of the scanner could be normal, if you use high resolutions, like the optical 4000 dpi. In this case, SilverFast simply cannot process the scan data fast enough and the scanner goes into start/stop mode. Strange is, that the entire frame is scanned 4-5 times and that the resulting image is blank (I will hope there is an image at the correct place on the film holder;). To help you, please send the SilverFast logfile and the preference files (you find them in the SilverFast directory of your PhotoShop?s import directory) to LaserSoft at Eric.Flyvbjerg@silverfast.de.