HP Photosmart C4480 Series "Incompatible print cartridge"

INSTRUCTIONS: 1. Simultaneously press both the X button and the power button and hold 2. (NOT simultaneously) press BLUE button then GREEN button then GRAY button (in that order) 3. using blue (or grey) button, scroll-seek to the "information menu" - press OK button 4. press grey button once for "checksum for relock data input" - press OK button 5. press (X) repeatedly until you return to the normal main menu 6. PRINT