NET TIME mess my Windows 2000 servers' time

Hi,

I have ntpd daemon configured and working in a Unix server, I know
it's working because all my other Unix and Linux servers sync their
time properly using ntpdate. My ntpd server TZ is GMT -3 with no DST,
so as all my *nix and Windows 2000 servers. But when I sync the
Win2k's time using:
> net stop w32time
> net time /setsntp:10.0.1.78
> net start w32time
The server time goes 6 hours back. So on any *nix server:
# date
Wed Nov 19 18:02:57 GMT-3 2003
In the Windows server, when sync'ed, it'll go:
> time
The current time is: 12:03:07.84

Someone had the same problem? Is there a workaround?

Thanks,

Rafael