title: How to run VS 2010 Local IIS in 32 bit mode
body: <p>I have referenced some 32 bit and some 64 bit DLL in my ASP.NET MVC 3 project.</p>
  
  <p>The projects compile but I get runtime errors.</p>
  
  <p>It's because I am running the web project as 64 bit.</p>
  
  <p>How do I "enable 32 bit" in my local IIS (just how I can do it in IIS 7.5 Pro)?</p>
  
  <p>I am using .NET 4.0</p>
  
  <p>The error I get is:</p>
  
  <blockquote>
    <p>Retrieving the COM class factory for component with CLSID {A6775dfd2-1dfF-421C-A187-4D55F4DDFBFF} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).</p>
  </blockquote>