title: axAcroPDF does not display PDF on windows XP
body: <p>I have a C# windows forms application that displays the user a pdf. I use the axAcroPDF control like that:</p>
  
  <pre><code>AxAcroPDFLib.AxAcroPDF pdfViewer = new AxAcroPDFLib.AxAcroPDF();
  ...
  pdfViewer.loadFile(@"C:\a.pdf");
  </code></pre>
  
  <p>This works fine on my PC and on my colleagues', but only on the ones who have win7 running. When trying on a winXp machine it does not work, i.e. loadFile() returns false. </p>
  
  <p>Any ideas?</p>