Clean URLs working/notworking

Hi Drupal community...I have been wresling with the clean URLs option and for some reason I don't get it to work properly. I hope that one of you can spot the error.

I have set the httpd.conf file in /etc/httpd/conf/httpd.conf as:

<Directory /var/www/vhosts/mydomain.nl/htdocs>
AllowOverride all
RewriteEngine on
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
</Directory>

I have the drupal .htaccess file in the docroot and I've tested that it works by putting something bogus in it...it will come back with a good old error message.

When i do the "clean URL test" at ?q=admin/config/search/clean-urls it will just refresh the page, no option to turn on clean URLs, nor an error page.

I assumed that something in the .htaccess must be failing, but when I manually change my URL from http://dev.mydomain.com/?q=node/1 to http://dev.mydomain.com/node/1 it loads the page properly, so that makes me think that the .htaccess is doing its work partially anyway. But when I however create a new basic page, it will still display the ?q=, when I make it into a menu link, it still has the ?q= query stuff.

So the clean URL is ending up at the correct node, but it does not get changed in the address bar automatically, nor does Drupal create new pages, links and menu's with the clean URLs, and this is probably related to the clean URL test not working...

Any ideas?