title: SQL CE 4.0 as a InstallShield Prerequisite
body: <p>I'm making my own prq file to perform the SQL CE 4.0 installation with my WPF application installation.  The installer keeps failing, and I'm not sure why.  It looks like it attempts to run the CE exe, but then a Windows Installer help window comes up with all of these command line help options.  I click OK, and then it says the installation of CE has failed.  I don't how to determine what is going wrong.  </p>
  
  <p>Here's my prq file contents:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;SetupPrereq&gt;
  &lt;conditions&gt;
      &lt;condition Type="32" Comparison="2" Path="HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server Compact Edition\v4.0\ENU" FileName="DesktopRuntimeVersion" ReturnValue="4.0.8482.1"&gt;&lt;/condition&gt;
  &lt;/conditions&gt;
  &lt;files&gt;
      &lt;file LocalFile="&amp;lt;ISProductFolder&amp;gt;\SetupPrerequisites\SSCERuntime_x86-ENU.exe" URL="http://www.microsoft.com/download/en/details.aspx?id=17876" FileSize="0,0"&gt;&lt;/file&gt;
  &lt;/files&gt;
  &lt;execute file="SSCERuntime_x86-ENU.exe" cmdline="/passive /norestart" cmdlinesilent="/passive /norestart"&gt;&lt;/execute&gt;
  &lt;properties Id="{F7BF54C1-CA2C-4410-98DB-480769CE6547}" Description="This prerequisite installs the Microsoft SQL Server Compact 4.0."&gt;&lt;/properties&gt;
  &lt;/SetupPrereq&gt;
  </code></pre>
  
  <p>Any help would be much appreciated.</p>