hmmm, ok my Mamiya 645 Super kit with 3 lenses is now complete and ready for use (I love you ebay) It came with a cable release adapter but I am not sure it works or if I am using it right? I slide open the side compartment, plug in the adapter, screw my cable release into the adapter, but using it will not fire the shutter. Camera is on, wound, everything seems right. What am I missing? thanks!