Live View doesn't require the LensControl. It just needs an open shutter. If you take the M22 off the camera when in Live View, then you will see the image go white, from over-exposure. That means it's working.
I'm fairly certain that the problem is with the software installation. Have you trashed everything? That means in the HD/Library/Eyelike folder, also the Framework in the HD/Library/Framework folder, then the HD/Library/Preferences, then in the UserAccount ; User/Library/ApplicationSupport/Eyelike, User/Library/Preferences/. Do a search in the libraries for anything Eyelike (I may have forgotten something).
Do you have any other Eyelike software installed, perhaps for a different back?
All I can tell you, is that it has worked on every computer I've used in the last 10 years. G3, G4, G5, Intel, so if the LensControl and M22 are working on your G4, then it is clearly not a hardware problem with the LensControl, or the M22, so it must be software. (Accepting that I haven't tried it on the most recent Intels).