I have 2 Z35's. They both still have the original cartridge in there, which is the 16 black and 26 colour. Why the heck didn't you get the same one? Don't mess around with stuff like that, keep it same. Was the 17 cheaper or something? Now you have all that wasted time and frustration. If you keep doing stuff like that, I'm not going to love you anymore.
BTW: My Z35's cost my $30cdn each at Staples. I got a deal from the manager 'cos they were missed during inventory. I have to admit, for an HP fan these printers are pretty darn good!