Hi, I'm totally new to studio lighting, so of course here's something I just can't figure out. I had a setup of two Norman ML-400 monolights and was shooting with my Nikon D70 and (one) SB-600 flash. The flash was mounted on my camera and not attached to the lights whatsoever. Everytime I took a photo and my flash went off, the lamps automatically flashed as well. I don't want this to happen for every photo, and can't seem to figure out how to turn this automatic firing off. Any suggestions?