When we installed the print drivers, we also set up a specific preset for your laptop to print.  It is imperative you make sure you are printing using the correct preset.  The correct preset should be default-1 or POD Printer (depending how we set yours up).  When you select file/print, you should see something very similar to the image below.  Make sure your printer is set to the correct IP address and make sure Default-1 or POD Printer is selected.  This preset has your code attached to it and allows the printer to recognize your device.