It says to load paper

The 'MP' Tray is located on the front fold down tray. It is a Multi Purpose tray for one off jobs that require small quantities of differnt papers that you might want to use. Suppose you need to print a photgraph and teh paper trays are loaded with A4 normal paper, but you require a glossy page, just drop teh front [panel pull out the paper holders and slide in the glossy paper. It saves you having to unload and reload the already loaded trays. A good thing!
Jeff

Pull down the front cover where it says Brother, the manual feed input is behind that panel (above the main input tray)

Go into printer menu settings and reset printer to default. Shut it down, turn it back on, should reset and print from main tray. This helped my problem. 8.31.09