Epson V600 using the Silverfast 9

I’ve been using the Epson v600 with the software of Negative lab pro and Silverfast for almost one year however I’m using the Silverfast 9 with the resolution of 3200 with the 300 ppi. the images that I got sometimes are way to pixilated. Is there anyway that can be changed. I’m scanning a 35mm film with the camera of Canon ae-1 program and Pentax zoom 90 wr