I wouldn't do it with a frame like that as it's not a redirect it's simply making your main site content visible on another domain but this other domain has no content of its own, so really has nothing to be indexed.
If you want your .com.au to send visitors to your .com then I'd park the .com.au over the .com site within the hosting control panel and make sure that I have a .htaccess that redirects everything using a 301 to the .com version e.g.
Code:
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.adr-international\.com [NC]
RewriteRule (.*) http://www.adr-international.com/$1 [R=301,L]
The above assumes you are on apache, but simply says if the browser asked for anything other than www.adr-international.com e.g. www.adr-international.com.au then do a 301 redirect to www.adr-international.com
Hope that helps.