Canon 50mm f/1.4 USM lens with Magic Lantern rack focus not working (need help)

I am using a 5d mark ii with magic lantern 1.09 running on it. I am trying to use the rack focus feature, but I can't get it to work at all. I remember the magic lantern website mentioning how some older Canon lenses do not report back certain data to the camera, so rack focus wouldn't work. Is this the case with this lens or am I just doing something wrong? The stack focus photography function is working, I just can't get the rack focus to zoom to the starting point. I press the Zoom + button and nothing happens.

Anyone familiar with magic lantern that could offer some advice?
 
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