I have only created the batch file as I don't want it to run all of the time, I just fire up the batch (.bat) file before I plug in an unknown USB. Once started once I plug in the USB ashQuick.exe scan it
I don't know what you have done, how you created the batch file, exactly what you have entered in the command string of the batch file; you can't just enter my command string as that relates to my system; you have to enter the full path to where the USBVirusScan.exe is (contained in "quotes" as mine is but your own path).
So I can't really suggest anything in the dark, see image (click to expand) of the about USBVirusScan info, if that isn't enough then I suggest visiting the web site URL in the title bar of the attached image.