I have had this combination for quite sometime now, and when I'm shooting I get the error 99, and the camera freezes. I have cleaned all contact points, has anyone else had this problem. It's so random, one dive I maybe take 50 shots, next I get down 40 Ft. 2 maybe 3 shots, then the error! I have tried my three different lens, Canon, 60mm Macro, Canon 17-85mm, and Tokina 12-24mm, it does it with either set up! It's very frustrating to the point where I'm not even using it much as I'll be at 80 Ft, with a big SLR attached to my BCD along for the ride........Help!!!!