I have a Nikon SB-24 speedlight, and I would like to be able to use it with a couple of older rangefinder cameras that only have cold shoes for flash, not a hot shoe. If I insert the flash in the shoe, it does not fire when the shutter is triggered. Off-camera, works fine, but on-camera, nothing. (Yes, with sync cord.) Is there a way to get them to work together, or am I going to have to get a different kind of flash?