problem with feed – wrong RSS link?

I am really hoping someone will help me work this out as I have spent many hours already and gotten nowhere.

I have a WP blog that is installed in a sub-directory but called from the root directory, as in http://www.codex.ww.wp.xz.cn/Giving_WordPress_Its_Own_Directory. I have permalinks on. That all works fine but my feed isn’t.

My feed doesn’t seem to have the right link:
this works – http://www.redinstead.com.au/feed/wp-rss2.php
this doesn’t – http://www.redinstead.com.au/feed (white page with no content in source code)

this: http://www.redinstead.com.au/feed/rss2 (which http://www.codex.ww.wp.xz.cn/WordPress_Feeds tells me should work) redirects to http://www.redinstead.com.au/feed (which doesn’t work)

I have tried redirecting using htaccess but I am not an expert so may be doing something wrong as it doesn’t seem to do anything:
Redirect 301 /feed/wp-rss2.php http://www.redinstead.com.au/feed

My comments feed seems to work properly – does this sound like the right URL is being generated:
http://www.redinstead.com.au/what-is-branding-anyway/feed

PLEASE any help would be SUPERGREAT! Thanks in advance

Jen
http://www.redinstead.com.au