Mamiya 645 DF with HM401 Film Back. Does this combination work?

[edgardo.cardinali]

Just got a 645 Mamiya DF used and a brand new HM401 Film Back that this combination is not working. Camera shoots well but do not move the film
Does anyone have a solution for my situation?
Thank you

 

[JeffK]

I believe the DF and DF+ only work with digital backs.

 

[spijker]

Only the AF/AFD(II & III) bodies work with the HM401 and HM402 film backs. The Phase One AFD is the same as the Mamiya AFDIII.