I have a Pixma MP210 colour printer/scanner. I have recently refilled the colour cartridges but for some reason the printer doesn't seem to recognise that it has colour available. It has successfully printed colour documents before I refilled the cartridges (pictures etc). This happened once when I refilled the black ink cartridge and at that time I had to de-press a button (can't remember which one now) and then it kind of forced the printer to recognise that the black ink was full again. At least when that happened my computer kept mentioning that the black ink was running low - in this case it makes no mention of the colour ink at all.

Any ideas?