My printer was working quite normally yesterday but when I tried printing today it just wouldn't print. The black ink was getting a bit low so I put a new one in and the other inks are fine so it's not that. The Mac says that it's printing but its not, the printer copies fine it just isn't picking up from the Mac. The only thing I've done differently is update Word, which also won't print, could it have been that and can anyone help me fix it. The printer is an Epson SX435W