xntpd sync very slow on some system

SuSE 8.2 Pro Compaq DL360 G3 and Compaq sff desktops okay I have started xntpd on 6 systems 2 synced in in a matter of hours the others are well after two weeks are about the same amount of time off (the other four were installed from the RPMs after I used scp to locate them to the machines YAST not involved but the machines that synced in quick used YAST to install xntpd) I have confirmed that xntpd is started and reportsitself as running normally and am using 2 level one times servers (same configuration file on all six machines) Does YAST installation of xntpd do some extra configuration not done via the RPMs? or any other ideas??? Thank you