Vista - Net Time Command

On my network, in the login script I use the net time command to sync
the clocks on the PC's to the PDC. I've added (1) Vista PC to the LAN,
and the login script cmd file stops at the net time command due to lack
of privlidges. UAC isn't popping up. Is there a work around so that I
can sync the clock to the network PDC with the login script?

Thanks.

John