I have gone through all of the trouble shooting. Confirmed I have the latest pm3 firmware, latest version of row pro and installed C2 logcard utilities.
Now when I plug in the PM3 windows comes up with a message that the device plugged into the usb port is not recognised, with no drivers installed. Somehow, windows seems to have dumped the drivers for the pm3.
Does anyone out there have any idea, where I can obtain the drivers to re-install them onto my computer so that the pm3 is reconised?????

The pm3 works fine as a stand alone.