Look at the validator and fix the issues first (especially the empty lines before the feed declarations start!):
Validator result
My problem (you commented in the other thread and asked) was a different one that was unrelated to this.
im not sure where to make these changes?
Look in your wp-includes directory for files starting with “feed-“
feed-rss.php
feed-rss2.php
…
Depending on which one the error is in (can’t see your site right now aside from some MAIN PAGE), fix that file.
Or reupload those feed files from the WordPress distribution (but then you revert to the original file if you made any changes since then).
And?
It seems to work again?
Can you say what you did to fix it?
Can you set this topic to closed?
