I'm relatively new to the DSC HX400V camera and I just got a HVL-F43M flash and I'm trying to setup my camera Flash Mode to be Auto Flash. The camera is only allowing me to use Fill Flash which shows up in the F43M. Camera manual says that default and available Flash Mode is dependent on shooting mode and I tried all the modes (i.e. P, A, S, Intelligent, etc) but it won't take Auto Flash. What am I doing wrong?