Hello again, have reinstalled the original cd that came with my canon ip4000
At first there were no change in result, although I noticed the media and paper source had changed automatically to the right choice when I opened the disk tray. (even b4 i reinstalled the whole printer but after I switched it off for a while then on again)
I had a spoiled printable disk and created a little spot of colour on top of my printable area and experienced with other colours. (it's faster with on large dot only and you can keep moving it around your blank disk to experiment untill you run out of room!)
The red did come up but a little shy. so encouraged by this I tried the maroon again but as before it turned out bright green.

. so I went to other colours. Brown was ok Black was very black.
I went back to red and my first try was just as black as with the black !??
However I tried the red again (actually this is when i really started a full spot - and low and behold (these weren't actually the words I used, but this seems to be a decent forum

It was BRIGHT red!!!
I reprinted my anemic first go and it look quite good.
Well I let you do your deduction.
Perhaps this is your problem too one of the cartridge is not priming properly in cd print and hope you're as lucky as I am.
Bye MB