SUSE 8.2 firewall vs. ntp

Hi, I replaced the CMOS battery in the comp of my mom, but still decided to go for the weekly time calibration from an ntp server (via ntpdate timeserver and hwclock --systohc --utc). After the first few tries I realized that by default the firewall of SUSE 8.2 doesn't allow UDP port nr. 123 of the timeserver to connect to the same on my mom's computer. I attempted to open up UDP port 123 to the internet via FW_SERVICES_QUICK_UDP, but that was not effective. Would you please suggest me an easy way to achieve the wished results?! Thank you, Pelibali