We are sorry to answer this question until now, but our system had a bug, and these questions were hidden.
I will suggest, if you have not done this yet, download our utility tool ZSU (Zebra Setup Utilities ) , and try to remove and reinstall the drivers of the printer again.
Once you have reinstalled these again, please try to do a simple test with ZSU to see if the printer responds in USB to your call with this simple ZPL command,
(~hi) like the picture shows below.
If the command does not work. My following recommendation would be to review the firmware version of the printer. Please review the latest firmware in the following link.
Please, review the firmware of your printer, and if it is out to date, then we recommend to use ZDownloader to update the firmware of your printer. After this process your printer should be able to work correctly.