Browser Print says "Printing Complete" but the printer not printing

Hi,

Would like to ask if you have any idea with the problem I encountered lately.

In my development machine. GK420T works great and able to print barcodes and label.

But after my deployment, I tested it to one of the end user production machine and its not working.

After  printing, a message saying that "Printing Complete" but the printer was not printing anything.

Really need this one to be fixed as this is highly needed by our Production.

Thank you.

-Albino