4500N with Duplexer won't print 2-sides

[Harley]

I recently bought a used 4500N printer with duplexer. They said everything works good.
I'm using Windows 7. I select print then properties & select 2 sided printing. But it won't print both sides instead it prints 2 sheets. Any suggestions?
Thanks
Harley

[v.andreev]

Hi,

Please provide more info about the driver. Is there any errors on the screen?

[Harley]

There are no error messages.
I printed the Menue page and tried to find information about the drivers but found nothing. But, I did notice there is a difference between the printed menu and the menu on the printer.
Under "Printer Setup / Paper Handling Settup" the printer did not show "2 sided printing" but the menu does show this.
Also, under "Information / Sample Pages" 2 Sided Demonstration is shown on the menu but not on the printer. Does this information mean anything to you?

[Kimzi]

Hi, Harley!

Are you sure that the duplex unit is correctly installed?

Have a look HERE, and print a config page to see if it's installed.

Best Regards

Kimzi

--------------------------------------------
Please remember to select "Accept as Solution" for posts that helped you solve the issue.