Ottawa Canada Dear Tracey and List: As David said, carefully check your printer for a stuck sensor, paper jam or other obvious problems. If this doesn't clear the problem, phone the printer manufacturer's tech support line or ask the dealer you bought it from. It would seem reasonable to assume the Media Tray is the paper tray but some people who come up with names for this stuff have vivid imaginations. Idea! Check if there is a second or third paper tray tucked away in an un-obvious place! My big HP printer says it has three paper trays, one of which is the manual feed slot and the other two consist of one that holds 100 sheets and the other is the optional large one which holds 500 sheets. And when it grumbles about being out of paper, I generally find the tray I check is full of paper but the one it is trying to feed from is empty! Good luck! Brian