[syslinux] problem with isolinux or mkisofs?

[Jacques FRISTO]

Hello,

I'm Jacques living in France.

I have a problem when I use isolinux.
I'm working on a multiboot cdrom so I make many "mkisofs" for testing.
The problem is that when I modify the "isolinux.cfg" file and then build my image with
mkisofs it's the previous configuration of my "isolinux.cfg" which appears on my screen (I run the .iso file with qemu...)
I don't understand why.

Thank you for your answer (and for syslinux too!)

Jacques FRISTO (a new french user of isolinux)