I've also test to replace the run command by this line:
shell "%COMSPEC% /c start /wait d:\setup.exe"

and no success

so, after all these tests, It seems that the CreateObject instruction do not permit to create a background process (the setup.exe is launched but when it try to create a new process, it can't do it).

I won't say it's a problem of Installshield as it works fine when I use it before the createobject instruction.

I'm really out of idea. I wanted to make a graphical interface to launch silent installs.
maybe I should post a bug report to Kixforms forum ?

help !!

[Smile]