Redirect existing atom.xml (without Feed Director?)

Hello, I’ve spent two days going through the forums and Google for help with redirecting my atom.xml, and while I’ve found bits of advice here and there, I’m not having any luck.

A few weeks ago I changed my site from Blogger to WordPress (which was a great and easy thing to do) – however, I recently noticed that the RSS readers that syndicate my site are still pointing to my old (and now broken) Blogger atom.xml, which is causing problems and raising eyebrows.

I just want to be able to have this file (https://www.kinosport.tv/feed/atom.xml) point the readers to the WP atom (https://www.kinosport.tv?feed=atom) or, better still, FeedBurner (https://feeds.feedburner.com/Kinosport).

+ I’ve tried Feed Director with no luck: it installs and I can activate it, but it doesn’t work when I change it to ‘feed/atom.xml’ => ‘index.php?feed=atom’ – and I’ve read that others using WP 2.0 have been having problems, too.

+ I’ve also tried the Feed Locations and FeedBurner plug-in, but these don’t update the atom.xml file.

+ I’ve spend nearly a day trying various approaches to creating a .htaccess file (by making a text file, adding the code I’ve found in the support forums, and then renaming it to .htaccess in the directory w/ 666 permissions) but this does not fix it either. For some reason, most of the support posts dealing with this are over a year old and unresolved.

The code I’m currently using is:
RewriteRule ^/feed/atom.xml$ ?feed=atom [R,L]

If anybody can give me a simple walk-through or point me in the right direction, I would be incredibly grateful. This doesn’t seem like it’d be tough thing to do and I’m sure (and I hope) I’m overlooking something simple.

Thank you!