We have a HP laserJet P4014n with 4 trays. We want to print invoices with three copies, each to a different tray loaded with different color paper. I created three printers one for each tray. I configured each so that each is directed to a different tray. The test pages print to the correct tray(s). When we print from our software all copies print from the bottom tray. When you print the configuration at the printer it prints from the bottom tray. I have downloaded several drivers but nothing changes. What could be the cause and solution?