Tracking force set incorrectly? If need be, set it to near zero. Best of luck using your wonderful new acquisition!
The arm should move slowly counter-clockwise when the arm switch is on, whether the platter and vacuum are switched on or not.
Try manually swivelling the arm back and forth through its entire arc a few times. This might engage the mechanism somehow. You should feel a slightly "rubbery" resistance from the slip clutch. If the arm swings as freely as a real tonearm then the clutch is broken or misadjusted.
If that doesn't do it I'd contact Smart Developments. Norm is a regular guy and stands behind his products.
Stick with it. The Loricraft is every bit as good as you've read. I couldn't imagine doing vinyl without mine.