We have a brand new hp p4015tn network printer. We also, in addition to the multifeeder, the main tray, and the additional tray that comes with the hp p4015tn, purchased a tray 4 for legal paper. As well as an envelope feeder. The printer properties and preferences, however, are not showing the 4th tray as an option on the drop down menus, nor does it seem to recognize the envelope feeder. They are attached properly to the printer. Is there any special way to get the printer driver to recognize the additional tray and the envelope feeder. It is connected via USB to a windows xp sp3 machine. It is a newer DELL optiplex.