HP changed firmware on new released printers (2013) which uses HP 61/61xl inkjet cartridges. The old version HP 61/61xl inkjet cartridges which the original expire date is 2014/04/01 can't work on these new printers. We now have the new version HP 61xl inkjet cartridges which can work on these new printers.
The following new printer models will only accept new version HP 61xl inkjet cartridges:
Deskjet 1010, 2540
Envy 4500, 5530
Officejet 4630