My server couldn't update all internet feed via proxy:

27/09/2005 12:07:13 Agent error: java.net.UnknownHostException: www.vittelamazones.com

27/09/2005 12:07:13 Agent error: at java.net.InetAddress.getAllByName0(InetAddress.java:591)

27/09/2005 12:07:13 Agent error: at java.net.InetAddress.getAllByName0(InetAddress.java:560)

27/09/2005 12:07:13 Agent error: at java.net.InetAddress.getAllByName(InetAddress.java:553)

27/09/2005 12:07:13 Agent error: at HTTPClient.HTTPConnection$EstablishConnection.run(HTTPConnection.java:3702)

27/09/2005 12:07:13 Agent printing: agent error for feed: http://www.vittelamazones.com/rss/vittelamazones.rss message: IOException: www.vittelamazones.com



What could I chec to solve it?