need help with G11 and strobe

[fishnerd]

Hi- I'm a very novice u/w photographer. I just recently got a canon g11. I have an old sea and sea ys90 dx strobe that says it shoots ttl. I put the camera in AV mode, strobe in ttl mode. I have a fiber optic cable attached. According to the strobe manual a green light is supposed to come on when it's in TTL. I only get a red light. The strobe does fire, but I don't think it's on TTL.
any help you can offer would be greatly appreciated. we leave for a dive trip in 13 days and I'm trying to figure this out.
thanks!

[smb2]

I am not the best person to answer this question.
The Red LED is the ready lamp and lights up when charging is complete.
The green LED will show up for three seconds (in TTL) if the flash and camera have what it feels to be the correct exposure.
If the subject is "out of the proper strobe to subject range", the strobe will fire but you will not see the green light. You may then have an over or under exposed image. Check your distance to the subject and/or f stop.
Alternatively, as many might suggest on this site, set the camera and strobe on manual and adjust accordingly. After all you can review your image and histogram and make pretty quick corrections, with a relatively short learning curve.
Hopefully, somebody with a little more Sea and Sea hands on knowledge will post behind me.

[scottg]

it will not shoot it TTL, you have to use it in Manual mode. sorry!

[fishnerd]

Thanks so much for your input. I did some retail therapy this weekend and bought a new strobe that does shoot ttl and is much newer and more compact, and a wide angle lens. I leave in 7 days for Puerto Galera, Philippines. I can't wait - clearly I need lots and lots of practice!
Pec