If nothing is logged, then mod_rewrite does not work, either because the .htaccess is not read by apache, or the RewriteCond does not meet.
You can use a simple rewrite to see if it works:
Code:
RewriteEngine on
RewriteRule whatever.html some.html
Replace whatever.html and some.html with existing pages and test if apache redirects whatever.html to some.html
You can also put the rewrite directive inside the <Directory ...>..</Directory> of your vhost.