[kubuntu] Unable to contact time server

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http://ubuntuforums.org – When I attempt to update the time with the time widget and activate automatic updating, I get the message "Unable to contact time server:pool.ntp.org". I can ping pool.ntp.org, however. I also tried a few other time servers, with the same result. However, if I enter the widget with "adjust time automatically" already checked and then click OK, the time does get adjusted. If I uncheck the box and check it again, then both "Apply" and "OK" give me the error. What is going on here? (Hardware)