First of all, we have to check if PdfPrinter was installed correctly. Please check Control Panel to see the software installed on your computer:

Control Panel -- Software

If PdfPrinter is not installed, please download and install it again.

PdfPrinter is installed correctly?

Then check if the PdfPrinter monitor is running. You can see it in the system tray next to your Windows clock:

If the PdfPrinter monitor is not running (it should usually start automatically), please activate it manually from “Start menue — Programs — PixelPlanet — PdfPrinter — ‘Start PdfPrinter Monitor’“.