title: The configuration section 'system.web.extensions' cannot be read because it is missing a section declaration
body: <p>I am getting error (<strong>The configuration section <code>system.web.extensions</code> cannot be read because it is missing a section declaration</strong>) while installing my Web Application in <strong>Server 2008 32 bit machine</strong> with <strong>.NET Framework 4.0</strong>. but it works well in 2008 r2 64 bit machine. </p>
  
  <p>This is my webconfig file info</p>
  
  <pre><code>&lt;configuration&gt;
  &lt;runtime&gt;
      &lt;assemblyBinding appliesTo="v2.0.50727" xmlns="urn:schemas-microsoft-com:asm.v1"&gt;
        &lt;dependentAssembly&gt;
          &lt;assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/&gt;
          &lt;bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/&gt;
        &lt;/dependentAssembly&gt;
        &lt;dependentAssembly&gt;
          &lt;assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/&gt;
          &lt;bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/&gt;
        &lt;/dependentAssembly&gt;
      &lt;/assemblyBinding&gt;
    &lt;/runtime&gt;
    &lt;system.web.extensions&gt;
      &lt;scripting&gt;
        &lt;webServices&gt;
          &lt;jsonSerialization maxJsonLength="2147483647"/&gt;
        &lt;/webServices&gt;
      &lt;/scripting&gt;
    &lt;/system.web.extensions&gt;
  &lt;/configuration&gt;
  </code></pre>
  
  <p>Any idea to get rid of this error?</p>
  
  <p><strong>Note</strong>: I have checked all the related entries in Stack over flow but nothing was useful for me</p>