I once had a very similar problem with an old HP Deskjet 540(?). It would constantly give me errors similar to yours. I checked all printer spool settings and what not to no avail, and sending it over to a friends for testing, it worked flawlessly. I figured it might be the parallel port that was the problem but after purchasing a new Epson Color Stylus 740, and using the same parallel port, I haven\'t had any problems and I was never able to figure out why the HP stopped functioning. I even sent it out to HP for a free repair and it still didn\'t function so i just gave up on it eventually. Go figure!