Warning: fopen() [function.fopen]: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in /index.php on line 1224

Warning: fopen(http://www.ipo.pl/index2.php?option=com_rss&feed=Artyku%B3y&no_html=1&task=categoryrss&catid=469) [function.fopen]: failed to open stream: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in /index.php on line 1224
Error reading RSS data.