Windows 7 - Zebra barcode printer S600( USB to serial cable) installation fails

Hi,zebra barcode code printer s600 there is no usb port,iam using usb to serial converter,PL-2303 USB-to-Serial Adapter is already installed,in windows 7 64 bit pc.In the device manager we can see in ports prolific usb to serial to serial comm port 2 is installed correctly,but when i start installing the printer driver the USB virtual port is not available for installing the driver,is it possible to install printer by usb to serial cable,please give some valuable comments.

Have you downloaded the newest printer driver?
Printer driver link: Driver - Search Results

There is also a firmware update: Firmware for Printers - Search Results

For updating the printer firmware,no plug in information is showing when connecting usb to serial interface to the system

Have you just recently acquired this printer and are trying to install it orhave you had this printer for a while and are now having problems with it?

This printer’s end-of-life was back in 2007 and all support stopped in 2010.
If your pc does not have a serial port on it I would probably suggest getting a PCI serial expansion card as that may be the only way to get it to connect.