Feed import does not work

Hi,

I want to import a feed (http://www.sela.info/sela-blog/categories/aromatherapie?format=feed&type=rss) in our blog, but it doesn't work. See attachments for our settings. We have set up a cron job to run every 30 minutes. But even if we start the import manuallly, it says import ok, but the feed is not imported.
Thanks for clarifying,

Michel