3880 not recognizing the new OEM maintenance cartridge

What do I have to do to get my 3880 to work again? I just installed a new Epson OEM maintenance cartridge, and it continues to say add a new maintenance cartridge. I have open the ink door, and removed all of the ink cartridges, and then reinstalled them, and nothing I do will get rid of the add a new maintenance cart message.
What to do?