maintenance light

I have a 2001 Honda Odyssey Van. I had my oil changed from honda a while back and they forgot to reset the maintenance light so it came on about 500 km later. I checked the internet to get the steps to reset the maintenance light and it worked fine. It seems that the maintenance light does not come on letting me know that a oil change is due. The maintenance light does come on when the van is started. Can anyone suggest what I should do. I am thinking about dis-connecting the battery making sure that everything will then reset .