title: Python: error while checking IE state
body: <p>Please, help me with Python 2.6 and win32com.</p>
  
  <p>I'm a newbie to Python and I got error 
  when I start the next program:</p>
  
  <pre><code>import pywintypes
  from win32com.client import Dispatch
  from time import sleep
  
  ie = Dispatch("InternetExplorer.Application")
  ie.visible=1
  url='hotfile.com'
  
  ie.navigate(url)
  while ie.ReadyState !=4:
      sleep(1)
  print 'OK'
  ..........................
  Error message:
   while ie.ReadyState !=4:
   ...
  
  pywintypes.com_error: 
  (-2147023179, 'Unknown interface.', None, None)
  ..........................
  </code></pre>
  
  <p>But when I change url to, for example, 'yahoo.com' -
  there are no errors.<br>
  How can result of checking ReadyState may be dependant on url??</p>