clean urls and dreamhost

I've searched the forums and haven't been able to find a solution to this problem, though I've seen it come up in several threads.

My drupal site is hosted on Dreamhost servers, and I cannot get the clean urls feature to work. When I enable clean urls, I get a message saying that mod rewrite must not be turned on. I suspect the problem is with my .htaccess file, but I'm not sure what part I'm missing. Here's my file:

# Apache/PHP/Drupal settings:
#

# Protect files and directories from prying eyes.
<Files ~ "(\.(inc|module|pl|sh|sql|theme|engine|xtmpl)|Entries|Repositories|Root|scripts|updates)$">
 Order deny,allow
 Deny from all
</Files>

# Set some options.
Options -Indexes
Options +FollowSymLinks

# Customized error messages.
ErrorDocument 404 /index.php

# Set the default handler.
DirectoryIndex index.php

# Override PHP settings. More exist in sites/default/settings.php, but
# the following cannot be changed at runtime. The first IfModule is
# for Apache 1.3, the second for Apache 2.
<IfModule mod_php4.c>
 php_value magic_quotes_gpc                0
 php_value register_globals                0
 php_value session.auto_start              0
</IfModule>

<IfModule sapi_apache2.c>
 php_value magic_quotes_gpc                0
 php_value register_globals                0
 php_value session.auto_start              0
</IfModule>

# Reduce the time dynamically generated pages are cache-able.
<IfModule mod_expires.c>
 ExpiresByType text/html A1
</IfModule>

# Various rewrite rules.
<IfModule mod_rewrite.c>
RewriteEngine on
#added the following 3 lines
#RewriteCond %{REQUEST_FILENAME} !-f 
#RewriteCond %{REQUEST_FILENAME} !-d
#RewriteRule .* /index.php [L]


 #allow access to html in subfolders
 RewriteCond %{REQUEST_URI} "/old/"
 RewriteRule (.*) $1 [L]

 # Modify the RewriteBase if you are using Drupal in a subdirectory and
 # the rewrite rules are not working properly.
 RewriteBase /223kb

 # Rewrite old-style URLs of the form 'node.php?id=x'.
 #RewriteCond %{REQUEST_FILENAME} !-f
 #RewriteCond %{REQUEST_FILENAME} !-d
 #RewriteCond %{QUERY_STRING} ^id=([^&]+)$
 #RewriteRule node.php index.php?q=node/view/%1 [L]

 # Rewrite old-style URLs of the form 'module.php?mod=x'.
 #RewriteCond %{REQUEST_FILENAME} !-f
 #RewriteCond %{REQUEST_FILENAME} !-d
 #RewriteCond %{QUERY_STRING} ^mod=([^&]+)$
 #RewriteRule module.php index.php?q=%1 [L]

 # Rewrite current-style URLs of the form 'index.php?q=x'. originally only one uncommented
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteCond %{REQUEST_FILENAME} !-d
 RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
</IfModule>

# allow pass through of stats from dreamost.
RewriteCond %{REQUEST_URI} ^/stats/(.*)$ [OR]
RewriteCond %{REQUEST_URI} ^/failed_auth.html$
RewriteRule ^.*$ - [L]
# $Id: .htaccess,v 1.66 2005/03/20 19:15:00 dries Exp $

If anyone using Dreamhost has clean urls working, I would love to know specifics of your settings.

Thanks in advance,
Dan