title: Installshield not installation prerqe (Framework 3.5)
body: <p>I am developing an app in Framework 3.5.
  I would like Installshield to check if Framework 3.5 is already installed.
  If it's not installed, i want it to download it from the internet and then install it.</p>
  
  <p>On my App Data -> Redistributables,
  I have Microsoft Framework 3.5 SP1 as a Installshield Prerqe.
  It is "Installed Locally" and build location "Copy from source media".</p>
  
  <p>I have Framework 3.5 as required for installation.</p>
  
  <p>On Windows XP, it works fine.
  It asks user to install Framework 3.5 if required.</p>
  
  <p>On Windows 7, 8, 2008: even if Framework 3.5 is not installed. It does not ask user the download/install it. It only prompts them that the installation cannot continue because 3.5 is not installed.</p>
  
  <p>Any idea on how to solve this problem ?</p>