Creating a prelaunch subscriber page

I’m launching a blog in a few weeks, until then I want to create a simple landing page that just has a form to get email updates or subscribe via RSS reader. That’s it.

What I have done so far
I’ve created a new page in my root called “index2.” On this page I’ve done the html for my prelauncc subscriber page.

In the .htaccess file I added the following line:
DirectoryIndex index2.php

Now when someone types in my domain, they’ll get the landing page instead of the blog. In order to get the blog, you have to type in: domain.com/index

Here’s where I have trouble. I can’t get rss feeds to work. Whenever I try to use Feedburner, it says that the page is a website not a a feed. It looks like it’s only looking at the static landing page. I want feedburner to pick up the feed from the blog (domain.com/index) so I can link to in on the prelaunch index2 page.

My plan is whenever I go live with the blog is to make the blog the landing page and get rid of my prelauch landing page. I’m hoping to build up some subscribers before I launch, so I can hit the ground running.

I’d appreciate any help.
Thanks!