Okay, you since you said you’re not a Linux guy in another post, I have to ask:
Are your clients running ntpd or using ntpdate? If ntpd, are what are you doing to cause it to re-read ntp.conf when you make changes to ntp.conf?
Oh, and how are you editing ntp.conf? On the linux machine, or on a windows machine and transferring to Linux?
Using ntpd.
After editing ntp.conf on the Linux machine, with VI, I restart the ntpd service (service ntpd restart)