title: CrystalReports error
body: <p>I inherited a web app which I'm tasked with maintaining.  The application has a dozen or so crystal reports, but I couldn't open them (well, I -could- but they were mostly numeric in nature).</p>
  
  <p>I installed this: <a href="http://scn.sap.com/people/coy.yonce/blog/2010/11/12/crystal-reports-for-visual-studio-2010-production-release-now-available" rel="nofollow">http://scn.sap.com/people/coy.yonce/blog/2010/11/12/crystal-reports-for-visual-studio-2010-production-release-now-available</a></p>
  
  <p>Then, I could open them properly.  I made the necessary adjustments to some of them, saved, and attempted to test locally.  Before installing crystal reports (above), I ran the application locally and it worked fine.</p>
  
  <p><strong>The problem:</strong> Now that I've installed it and made my changes (very minor stuff and only to the rpts, not to any aspx files), I'm getting this error:</p>
  
  <p><strong>Parser Error Message: Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.</strong></p>
  
  <p><strong>Source Error: [No relevant source lines]</strong></p>
  
  <p>Here's what I have in Web.config pertaining to Crystal Reports:</p>
  
  <pre><code>        &lt;assemblies&gt;
              &lt;add assembly="CrystalDecisions.Shared, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/&gt;
              &lt;add assembly="CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/&gt;
              &lt;add assembly="CrystalDecisions.ReportSource, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/&gt;
              &lt;add assembly="CrystalDecisions.CrystalReports.Engine, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/&gt;
              &lt;add assembly="CrystalDecisions.ReportAppServer.ClientDoc, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/&gt;
  </code></pre>
  
  <p>The versions here match the version in the reference's properties.</p>
  
  <p>There are no dlls in the bin folder beyond the application's own dll.</p>
  
  <p>There are the following 'Crystal' related references: CrystalDecisions.CrystalReports.Engine, CrystalDecisions.ReportSource, CrystalDecisions.Shared, CrystalDecisions.Web</p>
  
  <p>I've researched the problem, and some say I need to add an ajax dll.  Which one?  Also, in what way does that relate?</p>
  
  <p>This was supposed to be a tiny adjustment and it's turning into a big thing at this point.  Any help you are able to offer is greatly appreciated.  </p>
  
  <p>Thanks!</p>