I'm using a Canon G15 with the corresponding Ikelite housing and an [old] DS50 strobe. I have noticed that after taking a single image with the G15, the camera loses synch with the strobe and does not display the little lightening bolt to indicate it is talking to the strobe. If I switch the strobe from "TTL" of "off" and then back to TTL, then the lightening bolt comes back on again and the next image I take will have a preflash and then the strobe intensity cut back appropriately via the TTL connection. But then after I take that image, I'm back where I started again and have to reset the strobe to get it to synch with the camera. I've recharged all the batteries, but that didn't seem to have an effect. What am I doing wrong? I know the camera used to maintain synch with the strobe and I could take multiple images with the strobe without having to reset it.