Synching to an atomic clock...

I have a windows 2000 SBS and want to synch to a time service.

I did the following things...

1) Stopped the time service
     "net stop w32time"
2) Set the time server..
     "net time /setsntp:windows.time.com"
3) entered "w32tm - once"
3) Started the time service again...

Now, will it automatically synch once per day by default or do I need to 
specify further parameters to do this?

I tried the "w32tm -period 0" command but it just sits there until I use 
<CTRL><C> to get out..  Am I missing something?

Thanks!

Brad