mod rewrite - What am I doing wrong?

I put the following lines to my .htaccess and did some tests

This works fine - browser goes to google (so I have mod rewrite working, right?)

Options +FollowSymLinks
Options +Indexes
RewriteEngine on

RewriteBase /

RewriteRule old\.html http://www.google.com/

Code (markup):

But this does not - I get a 404: (I do have a "new.html" in the root directory)

Options +FollowSymLinks
Options +Indexes
RewriteEngine on

RewriteBase /

RewriteRule old\.html new.html

Code (markup):

What am I doing wrong here?

 

Hello,

I could not see any domain name here

 

When using below code - make sure the new.html actually exists!

Options +Indexes
Options +FollowSymlinks
RewriteEngine on
RewriteBase /
RewriteRule ^old\.html$ new.html [L,R=301]