This has happened to me also, until I learned that you must
put the line on the ruler on top of the cut pieced to get an
accurate square or whatever you are cutting out. You can't
butt the line up to the cut side...it will short your piece. So
if you can't move your needle, try this. Hope it helps.
I am new to this board today....and needed to sign in to
let you know what happened to me.