title: Exception: Unable to retrieve security descriptor for this frame exception
body: <p>The exception from the subject line is thrown when I am trying to load an XSL spreadsheet. The call stack is attached below. This program worked for a while with a variety of style sheets now it works on some comuters but throws this exception on some other. I looked it up on the internet but <a href="http://social.msdn.microsoft.com/forums/en-US/xmlandnetfx/thread/c5ba915d-d35b-4170-96b1-fb2b107f8779" rel="nofollow noreferrer">this</a> is all I could find and it does not give any answers other than some vague suspicion on some seciruty update. I am at loss. Any ideas?</p>
  
  <pre><code>at System.Security.SecurityRuntime.RevertAssert(StackCrawlMark&amp; stackMark)
  at System.Security.CodeAccessPermission.RevertAssert()
  at System.Xml.Xsl.XmlILGenerator.Generate(QilExpression query, TypeBuilder typeBldr)
  at System.Xml.Xsl.XslCompiledTransform.CompileQilToMsil(XsltSettings settings)
  at System.Xml.Xsl.XslCompiledTransform.LoadInternal(Object stylesheet, XsltSettings settings, XmlResolver stylesheetResolver)
  at System.Xml.Xsl.XslCompiledTransform.Load(XmlReader stylesheet)
  at AIM.Letters.Documents.Layout.get_WordXsl() in c:\AIM\LettersSolutionII\LetterDocuments\Documents\Layout.cs:line 29
  at AIM.Letters.ProcessingService.Activities.TiffGenerator.BuildWordML(LetterJob jobDocument, Layout layout) in C:\AIM\LettersSolutionII\LetterService\Activities\TiffGenerator.cs:line 253
  </code></pre>