barcode webapp printing

Hello, I am currently trying to print to my Z4MPlus barcode printer via a php web application. I first just want to test and see if I can get the printer to print anything using this code: <? function getPrinter($SharedPrinterName) { global $REMOTE_ADDR; $host = getHostByAddr($REMOTE_ADDR); return "\\\\".$host."\\".$SharedPrinterName; } $handle = printer_open(getPrinter("ZebraZ4M")); printer_set_option($handle, PRINTER_MODE, "RAW"); printer_write($handle, "Text to print"); printer_close($handle); ?> When this is run it just returns with a blank screen without printing anything on my barcode printer. I am running XP pro, Uniform Server with the shared printer named "ZebraZ4M" The printer is attached LPT1 on my machine. I don't see anything on my error logs. Am I going at this the right way? I'm trying to be able to allow anyone to print barcodes on my intranet via this web application. -Josh