Feed is not working

[Raul Mannise]

i have this feed http://feeds.feedburner.com/ecocosas/YihK from my original feed: http://ecocosas.com/feed/ and feedburner is not capable to ping my site: i have this error when i try it: An error occurred connecting to the URL: unknown error, i don know how solve this, please help me, sorry for my terrible english.