RSS Feed in vB 3.7.4

[David LeBow]

I'm trying to add an RSS feed to my site which will then populate a forum thread. The feed is here:

http://www.swissinfo.ch/eng/rss/business/index.xml

Unfortunately, when I preview the feed, I get the following message:

Warning: fsockopen() [function.fsockopen]: unable to connect to www.swissinfo.ch:80 (Ein Verbindungsversuch ist fehlgeschlagen, da die Gegenstelle nach einer bestimmten Zeitspanne nicht ordnungsgem?? reagiert hat, oder die hergestellte Verbindung war fehlerhaft, da der verbundene Host nicht reagiert hat. ) in [path]\includes\class_rss_poster.php on line 98
Warning: Unable to fetch RSS Feed in [path]\includes\class_rss_poster.php on line 231

The German is roughly: the connection attempt failed because the opposing side didn't answer correctly within the given time or the connection was faulty because the connected host didn't respond.

I can imagine that there may be some required setting at the server, but could anyone point me in the general direction so that I can let them know where to look?

Thanks.