Mp530 black cd printing problem

hello there!
since last month, my canon stopped printing black on cds (while on papers it works-even with the same cd’s pictures)
instead of black she prints cyan.
i bought a new (and original) canon’s black, and new (chipped) cyan. and even tried to print a cd from photoshop (thought theres a problem with cdlabel print)
hopes someone will help me,
thanks, Erez.

The 530 uses photo black on discs, and pigment black on papers. I suspect you will see similar results on photo paper.

Suggest you run the nozzle check test and report back.