Humble noob begs wisdom re; htaccess

Hi,

My apologies if this is already covered, but I could not find an exact fix doing a search. Lots of general guides, which were are all great reading.

I am publishing a wordpress site at hawaiianshirtfriday.com, and the folks at Godaddy say my htaccess is probably to blame for the “403 Forbidden” error I am seeing.

RewriteEngine on
rewritecond %{http_host} ^maui.us [nc]
rewriterule ^(.*)$ http://www.maui.us/$1 [r=301,nc]
DirectoryIndex index.htm index.html

My main site uses php, and if I include “index.php” in the DirectoryIndex line, the main site will top working. This would be bad.

hawaiianshirtfriday.com is, of course, a subdomain hosted under maui.us, which has its own ip.

Any help would be greatly appreciated.