mod_rewrite is on in httpd.conf but produces 404

Hi,

I have a dedicated server running on CentOS. In my httpd.conf file, mod_rewrite is being correctly loaded:

LoadModule rewrite_module     modules/mod_rewrite.so
AddModule mod_rewrite.c

Code (markup):

And here's my .htaccess file for the main directory of the website with the issue:

Options +FollowSymlinks
RewriteEngine on
RewriteRule ^(.*)\.html$ index.php?params=$1 [L]
DirectoryIndex index.php

Code (markup):

However, whenever I load a page that is being rewritten, I get this error:

Any ideas?
Thanks!

 

Options +Indexes
Options +FollowSymlinks
RewriteEngine on
RewriteBase /
RewriteRule ^([^.]+)\.html$ index.php?params=$1 [L]