check fsaua.log and fsaua.dbg for details.
are you behind a firewall?
are using a http-proxy?
try to ping updates-tp.sp.f-secure.com from command-line.
try connecting to updates-tp.sp.f-secure.com using a browser.
Any other explanations why you would geta DNS-Error?
after several restarts FIS update now working.i have usb cdma modem,firewall enabled in FIS,no proxy,ping timed out but it's ok i have internet connection.