I recently acquired a Pixus MP990 Canon Printer. It is from Japan (hence the "Pixus" rather than "Pixma"). It's been working well, however I just had to change an ink cartridge today, and every time I attempt to do so I get a u140 "ink tank cannot be recognized" error. These are genuine Canon ink cartridges purchased from Canon's USA website.

Is a region issue causing the rejection, and if so is there a way to change the region of the printer to the US?

Is there anything else I can do?

(I have made sure it's not the physical connection that is the problem - I've tried two different ink cartridges in their respective slots, and I still get the same problem.)