RSS Feed Issue on same domain

HTTP request failure

Could not resolve host: onthegamblersside.com; Host not found

HTTP Transport:

string(12) “WP_HTTP_curl”

now i seen this before but here is a little more info for my issue. This site has a bunch of other rss feeds working fine. The RSS feed I am trying to use is on the same domain as the site.

http://onthegamblersside.com/news/forums/index.php?action=.xml;type=rss2

as you can see if you click this link it is clearly there. Anyone have any ideas

I have a dedicated server running IIS7 with Plesk.

http://wordpress.org/extend/plugins/feedwordpress/