Mod_rewrite problem on Apache 2

Hi,

I'm running into a modrewrite problem of the type 'it works on Windows but not on Ubuntu Hardy Linux'. I also cannot seem to be able to activate logging for modrewrite so it's really hard to debug the issue.

I have a directory /assets/54/images/sprite.png that needs to be rewritten to the internal directory /assets/images/sprite.png

I have a virtual host assets.mysite.com and I'm currently using .htaccess to block access to the demo site.

This is my code for mod_rewrite

NameVirtualHost *:80
 <virtualhost *:80="">ServerName assets.mysite.com
        ServerAdmin webmaster@mysite.com

        DocumentRoot /usr/share/apache-tomcat-6.0.24/webapps/ROOT/
        <directory>Options FollowSymLinks
                AllowOverride None</directory> 
        <directory usr="" share="" apache-tomcat-6.0.24="" webapps="" root="">Options Indexes FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all

         <ifmodule mod_rewrite.c="">RewriteEngine On
        RewriteCond %{REQUEST_URI} assets/.*
        RewriteRule ^.*assets/([^/]+)/(.*)$  /assets/$2</ifmodule></directory> 
[...]</virtualhost> 

When I request /assets/10/ I correctly see a directory display with all the subdirectories of /assets. However, when I click on one of the sub directories, e.g. images I get and see the /assets directory again

/assets/10/images

If I click again

/assets/10/images/images etc et etc

Any suggestions are appreciated. Also with regards to getting logging activated. When I insert the logging command in the Virtual host directory, I get an error and when I put it in apache2.conf, I get an empty file.

Very frustrating all in all. And I've run out of things to try.

Cheers,

Marc