(1) feed i'm trying to burn http://www.jackandjillpolitics.com/feed

(2) feedvalidator says it's ok but

(3) here's feedburner not letting me burn it
The URL you entered does not appear to be a valid feed. We encountered the following problem: Unknown feed format encountered (The root element is [Element: <html/>])

I hate posting all my tech questions to my blog, but feedburner doesn't seem to offer any support whatsoever. They have a Google Group. That's all.

I've tried using jackandjillpolitics.com/feed/atom and jackandjillpolitics.com/wp-rss2.php

They all result in the unhelpful cryptic message above.

Other info that might be of use? The blog software is installed at /blog but i have the public address as /

Could there be something in the .htaccess file?

Thanks to anyone who can hook me up. We have lots of RSS subscribers, and I don't want them to lose out.