Hi I've just bought some new ink cartridges for my ESPON-XP-305. when I'm printing stuff my colour levels are going down so all colours are being used. but everything coming out either blue or purple. even when I select to print in grayscale/black and white. what could be the problem and how do I fix please? also when I do a nozzle check it only prints out 2 squares with the colours PINK AND BLUE. thanks.