Getting mod rewrite to work - please help

Hi all, I have the following .htaccess file:

Code:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.mydomain.com
RewriteCond %{HTTP_HOST} ([^.]+)\.mydomain.com
RewriteRule ^(.*)$ /var/www/clients/client2/web7/web/_DEV/virtual_subdom.php?user=%1
</IfModule> 

I dropped it into /web, and now I expect every URL in the format www.mydomain.com/xyz to be redirected to

/var/www/clients/client2/web7/web/_DEV/virtual_subdom.php?user=xyz

(as far as no xyz directory exists in /web)

but it doesn't work, I get the ISPC3 404 page.


then I tried to modify the apache directives in the website options in ISPC3.

These are my current settings:

Code:

<LocationMatch "/">
    SecRuleRemoveById 970009,950006,970003
</LocationMatch>
<LocationMatch "/index.php">
    SecRuleRemoveById 950911,950001,950001,950013
</LocationMatch>
<Directory /var/www/clients/client2/web7>
Options All
AllowOverride All
Order allow,deny
Allow from all
php_admin_value safe_mode 0
php_admin_value register_globals 0
php_admin_value open_basedir "/var/www/clients/client2/web7"
</Directory>

I added the following 4 lines to try to get mod rewrite to work, but it didn't help:
Options All
AllowOverride All
Order allow,deny
Allow from all

Can someone please help me?
I am totally lost.

 

Thank you Till, it is working now!