If you have connected a flash to the x contact via a pc cord and it didn't fire then first of all check that the sync cord is working by shorting the pin, if the flash fires then I would suspect that the problem lies with the contacts in the camera, I don't know the camera, but some cameras will not fire the flash if the camera is not set to the sync speed or slower, so also check that the camera is set to 1/30th or slower.