I have a Neewer TT560 Speedlight which works fine as an off-camara flash with my Nikon D610 when firing single shots. However, if I use the self-timer delay (5s interval / 3 shots / 0,5s interval) or CL mode, the flash only fires on the first shot. Flash control on camara is set to CMD (Built in -- / Group A TTL / Group B TTL / Channel 1). Am trying to get some splash photos and this has me flumoxed (to use a polte word). Any help to get this newbee past this post greatly appreciated!