Digital Dolly doesn't work on 5D2

[MarosGrego]

Recently, I've installed the latest ML on my Canon EOS 5D Mark II, it's great etc., you know this.
The main problem I've encountered is that the MLV Digital Dolly feature doesn't work at all. When it is ON, the focus box doesn't move when the joystick is pressed in any direction, whether the movie is being recorded or not. If it is OFF, the focus box can be moved normally.
I haven't found any solution on this, so any help would be wholeheartedly appreciated.