2003 accord maintenance required light stuck on.

My 2003 Accord has the "maintenance required" light on and it will not
reset. The car has 72,000 miles and in the past that light has come
on a few times when I forgot to reset it after an oil change. It has
always rest to off when I followed the procedure in the manual of
holding the trip odometer reset down and turning the ignition to on
until the light turns out. However this time it does not rest.
Rather when I do the procedure the light flashed off for a half second
then it is back on. Do you have any suggestions what the cause might
be or how I can turn this off. I keep track of oil changes (every
3,000 miles) by a log book so this light is redundant. This is not
the check engine light and I have checked the ODBII and there are no
codes in the computer.