.htaccess help, non www->www + old->new redirects

I am having a little problem getting the old links to redirect to the new locations using the htaccess file. Here is a little clip of what I have (everything is working except the last rule).

Options +FollowSymLinks 
RewriteEngine on 
rewriteCond %{HTTP_HOST} ^mydomain\.com$
rewriteRule ^.*$ http://www.mydomain.com%{REQUEST_URI} [R=permanent,L] 
rewriteRule ^index\.(php|html|htm|asp|aspx) http://www.mydomain.com/ [R=permanent,L]
rewriteRule ^/links/test.html http://www.mydomain.com/links/test.php[R=permanent,L]

PHP:

 

Is the last rule not working at all, incorrectly forwarding the link, or giving an error when attempting to access that link?

 

the last rule is not working at all. It is just giving a 404 error and the url stays as the old url.

 

anyone have any ideas?