I am trying to get a Drupal 6 Clean URLs to work on Lunarpage shared Windows IIS6 hosting.

I have created a .htaccess on the Drupal webroot under /httpdocs/.htaccess

<IfModule mod_rewrite.c>
  RewriteEngine on
  RewriteBase /
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_URI} !=/favicon.ico
  RewriteRule ^(.*)$ index.php?q=$1 [L,QSA] 
</IfModule>

I have also tried adding into my settings.php
$base_url = 'http://www.mydomainname.com';

The problem is I do not think my .htaccess is being used as if i try to write some gibberish in that file nothing happens.  Does anyone have any ideas how to get Clean Urls to work on Windows IIS6 shared hosting?

Thanks much appreciated~