The native drivers (Assuming a 7345 or similar) do not have bi-di configuration. Switch to the GPD and it will do what you want.
I'm pretty sure there is no Xerox 7375, but I could be wrong, Xerox.com has no listing for it.
I'm using the Workcenter 7375 printer and installed the traditional driver version 220.127.116.11 using the TCP/IP port. My computer does not pick up the printer configurations like Finnisher Tray and Media Trays configuration. I can see this settings using the web-browser without loggin in to the printer.
Have I configured the printer incorrectly or do I have to much of expectation on the drivers?