Michael
1). server must be able to process SSI/CGI calls for that page, (some servers will only do this is the page is name filename.shtml).
2). The script must be able to output the text/html content without sending the <HTML>, <TITLE>, <HEAD>, <BODY>, etc tags... if the SSI exec call is placed in the BODY of another (.shtml) document.
The other answer is to redirect [domain.com...] to [domain.com...] either in the server setup or via an index.htm page in the web root directory with an META refresh tag.
just my $0.02...