ntp failure

Hi I'm trying to get my Suse 9.3 to correct my time with the yast ntp-client. I want the daemon to run in the background, and be started at bootup, so I choose the (I have it in norwegian, so this is my translation) "Start ntpd automaticly at boot time" I try to use my universitys NTP-server rasmus.uib.no When I press "test" now I get an error saying something like "server not available or does not answer correctly". OK, I think, let's try one of the predefined ones. I try several of the public ones, all yealding the same error message as before. What do I do wrong? -- Bjørge Solli