The leaver arm from the walking foot has to "hook onto" the knob/screw above the needle -not above or below.
Originally Posted by nance-ell
My walking foot has a lever on the right side of it (not sure why! lol). First time I loaded it, that lever was below the knob where the needle is attached and the needle wouldn't work. I had to reload the walking foot with that lever above that knob. Does that make sense? Could that be what's happening to you?