Have you tried the plastic bag method? I.e, make her so darned uncomfortable she WANTS to move?
I ask nicely first, then progressively make them more uncomfortable. Crack the whip, if she doesn't go. Crack it again. Still nothing? Bring out the bag. Shake it behind her rump. Unless she's very well broke as far as 'spooky objects' go, it's a pretty sure fire way to get her moving.