Permalink issue with IIS (httpd.ini)

Hi,

I helped a friend of mine with a template, which is located here
http://www.weddingvision.nl/blog/

now the normal permalinks work, he set it up using httpd.ini which contains:

[ISAPI_Rewrite]

# For file-based wordpress content (i.e. theme, admin, etc.)
RewriteRule /wp-(.*) /wp-$1 [L]

# For normal wordpress content, via index.php
RewriteRule ^/$ /index.php [L]
RewriteRule /(.*) /index.php\?$1 [L]

# /index.php/ is not really necessary
# RewriteRule ^/$ / [L]
# RewriteRule /(.*) /\?$1 [L

Now the problem is, when you go to
http://www.weddingvision.nl/blog/page/2
or say
http://www.weddingvision.nl/en (qtranslate)

It gives an error not found, which leads me to believe there is a problem with the ISAPI rewrite, but I have no experience with this.
Can anyone give me a suggestions?