Just got a Canon G12, Ikelite housing. Have had my Sea&Sea YS90 auto strobe for about 10 years. Always used the optical cord rather than the sync chord. Decided to upgrade with the option of adding a second strobe next year and bought a sync cord with splitter for two strobes. Interestingly, the cord doesn't have caps so I either have to buy a cap for the end that does not yet have a strobe or buy another strobe?? The real problem.... I can't get the strobe to fire when hooked up with the sync cord. I hooked my friend's Ikelite strobe up to my housing (using her sync cord) and my camera fires her strobe (G12 in full manual mode, Ikelite strobe in TTL mode). I hooked my G12 to the sync cord and tried my strobe with slave switch on and off and I tried the power mode in 'PRE', 'ON' and 'TTL' and every combination of the two switches. turned the camera off and on between each setting change... still nothing. Any thoughts or suggestions? Is there a setting on my camera I need to change for Sea and Sea strobe? The quick start guide that came with the sync chord says Ikelite does not support TTL with Sea & Sea strobes, but it does send the trigger signal to fire the strobe... maybe. Any help is welcome.