not able to get normalmap influence using sbsbaker.exe "curvature-from-mesh-v2" DOS command

Hello , im trying to bake a curvature for a low poly mesh using a normalmap , the quality of the curvature v2 seems better than the standard one so Im trying to get it to work. However when I try using v2 the bake seems clean but even with a reference to a normalmap it seems to ignore the normalmap in the baking process . 

Im using this command :

C:\Users\dirk\.nuget\packages\substancebatchtools\11.1.0\tools\sbsbaker.exe curvature-from-mesh-v2 --inputs C:\Users\dirk\Desktop\FoundationSimple\weatherbakeref.FBX --highdef-mesh C:\Users\dirk\Desktop\FoundationSimple\weatherbakeref.FBX --normal C:\Users\dirk\Desktop\FoundationSimple\Foundationrebake.003_uvnormal.png --output-size 12,12 --output-path C:\Users\dirk\Desktop\FoundationSimple --uv-set 1 --output-format png

Is something wrong / missing with the command or are there any alternatives?

ty!