.bat files will only trigger QlikView NPrinting designer, not QlikView NPrinting Server. Remember, this will execute the application, so the user which was used to install NPrinting must be logged on.
If you're using NPrinting Server, there are better ways to trigger reports, particularly if you want (for instance) to trigger your reports on successful reload of your QVW(s).
Take a look at this tutorial:
and this one to daisy chain triggering: