I have recently bought a used Workcentre 7132 and I'm struggling to print from any other tray than the first one.
I couldn't find any driver for Windows 7 x64 so I had to install the driver for Windows Vista. It looks like it's not perfectly working.
When I try to print, I get an error message telling me tray 2 (or 3) isn't installed. Here's what I see when I want to select another tray (sorry, this is in French, but you can still see the little exclamation mark) :