Upgraded our NW 6 sp2 DHCP to NW 6.5 sp3.

Since then when I try to renew the lease (from XP) with ipconfig /renew I
get the following error:
"An error occurred while renewing interface Local Area Connection : unable
to contact your DHCP server. Request has timed out."

All the leases are permanent. This is on XP and have not tried 2k yet. I
seem to be still getting the IP lease, just not sure why I started getting
the above error all of a sudden.

Also, why does the "lease expires" show December 31, 1969??