Hello,
This problem is solved. I could run the below script by creating a solution with the same name of my web setup project.
"C:\Progra~1\Microsoft Visual Studio 9.0\Common7\IDE\devenv" "C:\Users\Admin\Desktop\SebNewRESTSetup\SebNewRESTSetup.sln" /Build "Release" /Project SebNewRESTSetup
Thanks for all who support me to solve this.
Sebastian