V6II not working in HSS with Nikon D810 and Nikon SB700
I'm trying to use the following set :
- V6II TX mode (firmware 1.1008) mounted with Nikon D810
- V6II RX mode (firmware 1.1008) with Nikon SB700 mounted.
The flash worked normally, but no way to work in HSS mode.
The normal HSS icon it's not showed in the V6II TX mode, and my Nikon D810 do not allow me to increase the shutter speed, it's limited to 250.
Any ideas ?