I have a no name trigger which is working fine on my Nikon SB-24 flash. But, it could never fire the Promaster 7200EDF flash. Googling, i have seen that many have trouble firing 7200EDF remotely. I checked the pins under the flash, and it has the same alignment as the sb-24 :tongue:. Promaster manual and their support is not useful. They are asking me to try with new battery or try in Aperture mode . Anyhow, that is not working. It is a good cheap on camera flash. So, trying to get the best out of it before upgrading to Nikon CLS models. Any suggestions?