Unusable Colors using NLP - please help

Hi! I’m scanning negatives with my scanner and getting unusable colors from NLP. Does anyone know why?

The image on the left was scanned as positive film, color balanced on the film base, cropped, and then converted using NLP:

The image on the right with much better colors was scanned as a color negative and converted to a positive image by epson scan:

Neither example has been adjusted after conversion.

Just grab the white balance dropper and select a gray area like the fence. This could be an issue with your scan settings.