Windows 2000 Time Update

Hi,

I've got a Windows 2000 Server which just doesn't want to update it's
time correctly via "time.windows.com" or our "local"
"tick.nml.csir.co.za" or "tock.nml.csir.co.za".

The event log keeps on spitting the following out:-

Source: w32time Event Id: 14
"Attempt to set time which differs by more than 12 hours aborted"

I've followed the registry adjustments as per Microsoft to the word,
and configured the time manually to be in sync. Yet I am still
receiving this Event Error....

Should I adjust my local time zone??? to ... coher with another time
zone. Yet my users will not dig it.

P.S. My server's time zone is: GMT+2:00 Harare, Pretoria - South Africa

.