From other posts on this board, it seems that recording\motion detection\Day-Night schedules might not kick in instantly, but rather turn on and off at the next "change" in the schedule.
You might test by setting a schedule change a few minutes into the future.
You may also want to double-check the time\date settings on your cameras and your DNR-202L.
(Which cameras are you using? I have a pair of DCS-932L cameras which don't have microSD cards and as such don't have any recording options.)