LaserSoft Imaging

I am running Mac OS 9.2 with Photoshop 5. Polaroid Sprint Scan 120 attached by Firewire. I installed Silverfast Ai 6 application (Photoshop Plug In) and get Macintosh Code Fragment Manager Error. I thought this was just a SCSI problem. Any suggestions would be appreciated.

In this case, this error comes very often up, when Colorsync is not activated. Else, the error could be anything.

kind regards