I am scanning B&W negatives with an Epson 750. For the last few nights, I have been experimenting with various negatives and using both Epson Scan and Silverfast AI.

Using Epson, I am getting decent scans with either B&W negative or B&W positive, but with Silverfast, I am getting very strange results. Whenever I set up to scan with Silverfast as a negative, whether B&W or color, both ends of my histogram slam against the wall and clip. It doesn't matter what film I select in Negafix, I get the same result. When I switch to a positive, then the histogram behaves normally. This happens with various negatives, so it is not the negative.

There has to be some setting I have set up wrong, but heck if I can figure out what it might be. Any suggestions?