title: How to Install "Oracle Data Access Components (ODAC)" on Windows Server 2003 R2?
body: <p>I recently installed "<a href="http://www.oracle.com/technetwork/topics/dotnet/utilsoft-086879.html" rel="nofollow noreferrer">32-bit Oracle Data Access Components (ODAC) with Oracle Developer Tools for Visual Studio</a>" on my computer (Windows 7, 64bit). Everything seems fine and I can develop and run my application in Visual Studio 2010 and IIS 7.</p>
  
  <p>Now, when I deploy my application to the Server, it raises error:</p>
  
  <blockquote>
    <p>Exception: System.TypeInitializationException: The type initializer for 'Oracle.DataAccess.Client.OracleCommand' threw an exception. 
        ---> Oracle.DataAccess.Client.OracleException: The provider is not compatible with the version of Oracle client</p>
  </blockquote>
  
  <p>Obviously I need to install ODAC on the server, too. My server is:</p>
  
  <ul>
  <li>Windows 2003 32 bit R2 (I know, I know!)</li>
  <li>IIS 6</li>
  </ul>
  
  <p>So. I downloaded the same installation from Oracle website (ODAC 11.2 Release 5 and Oracle Developer Tools for Visual Studio [11.2.0.3.20]) and installed it on the server. But still getting the same error.</p>
  
  <p>PS: When I was installing, I chose <strong>Oracle Data Access Component for Oracle Client 11.2.0.3.20</strong> in Oracle Universal Installer. hmmmm. Should I choose "Oracle Server" instead?</p>
  
  <p><img src="https://i.stack.imgur.com/88N9d.png" alt="enter image description here"></p>