I've followed the instructions in the first post exactly. I've checked numerous times that it matches, and have tried numerous small changes to see if they would have an effect.
No matter what I do, the Launchbox "Loading" screen appears for about 2-3 seconds, and then it takes me right back to Launchbox.
I've also made a bat file with the exact command line syntax from the pinball loader read me, and that has a similar outcome, with a flash of black screen, and no launch of the table or program.