Cannot print directly to the printer
Try one or more of the following:
Make sure that Lexmark Print supports the printer model
For the list of supported printers, go to the Mobile Print Device Support page.
Make sure that ports 9100 and 631 are not blocked in your network
The Lexmark Print application and plug‑in use ports 9100 and 631 to communicate with the printer. For more information on opening these ports in your network, contact your system administrator.