When you ADD,SAVE or APPLY a RSS Feed it stores the publishing date of the last item created by the author.
If you try to import news just after adding the feed, you won't get any because the component downloads only the news published after the date stored for each feed.
You can
change the Publishing date to an earlier date and you'll get news published from the day you entered.For example, add this feed to your RSS feeds list (in the component):
http://rss.elmundo.es/rss/descarga.htm?data2=4Then check the feed and click on the button Download News. Probably you'll get no news.
Now edit the feed, changing the Publishing Date to one day earlier. Save it and download news again.
Now you'll get all the news published from the date you entered.