Not able to create connections to http://dmoz.org/http://www.dmoz.org/Health/Conditions_and_Diseases/Cancer/Genitourinary/Renal_Pelvis_and_Ureter,_Transitional_Cell/ from your server. The reason might be a firewall, proxy, or http://dmoz.org/http://www.dmoz.org/Health/Conditions_and_Diseases/Cancer/Genitourinary/Renal_Pelvis_and_Ureter,_Transitional_Cell/ or your web hosting company might be blocking outside connections. Another possibility is a timeout because of slowdown in internet itself.