Code:
AddType x-mapp-php5 .php #Required for 1and1 server which is php4  by default

Options +FollowSymlinks
RewriteEngine On

Redirect 301 /index.php?route=product/product&product_id=51 http://www.newdomain.com/new-page

For posting here, I have changed the new domain name, but the rest of it is the code copied from the htaccess I wrote.

If I code it domain-to-domain, like this:

Code:
RewriteRule (.*) http://www.new.com/$1 [R=301,L]
the 301 works, but the page-to-page 301 is not working.