I recently bought a Canon MP600R and have been very pleased but… I have managed to print on one DVD, however I now cannot and I am getting an error message asking me to close the inner cover. I have followed all the instructions, ensuring that I do not open the inner cover until told to do so, then inserting the CD-R tray, press print and then the error message. It asks me to close the inner cover and then press OK on the printer. If I do this, of course I take out the CD-R tray and it prints on normal paper. I am using the CD/DVD print software that came with the printer.