printer functions and pcl

I'm trying to output HP PCL commeands using the printer_write command. For example: $str=sprintf("\033&d0D"); // Underline Text $str.="Text to print"; $str.=sprintf("\033cE"); // Reset printer $handle = printer_open('\\\\DOMAIN\\PSERVER'); printer_write($handle,$str); printer_close($handle); The printer is configured for raw output. The output appears to be correct (I've compared the spooled job against one that works, so it would seem to be a problem with the job configuration e.g. the printer_set_option. I've tried using the MODE,"RAW" functio, but when I set this, the printer_write function no-longer works. can anyone help? TIA Mark