title: Language switching fails for multilingual drupal site
body: <p>I'm trying to build a multilingual web-site with Drupal 6 and currently I ran into a problem switching UI language. Switching language from the default one using language switcher block doesn't work and displays error message:</p>
  
  <p><em>The selected file could not be copied, because no file by that name exists. Please check that you supplied the correct filename.</em></p>
  
  <p>The following message gets written to a log:</p>
  
  <p><em>An error occurred during creation of the JavaScript translation file for the language <code>[language_name]</code>.</em></p>
  
  <p>Drupal 6 on Windows and IIS 7.0.</p>