Problem with path image

All my images are stored in …/_lib/img, and this is the path that i write in the php code.
When i run the project and analyze the page, the images have the same path.

When, in a html images field, i select an image with the image list form of scriptcase, the image in html page are stored with the full path /scriptcase/app/NAMEPROJECT/_lib/img

I try to change the path in application / settings with …/_lib/img but nothing change.

Any idea?
TKS