The control should come from the camera body. Note that only Nikon systems coupled with compatible flashes such as Nissin Di622 Mark II can have the 'red eye reduction' function.
Please see attached for the Nissin Di622 Mark 2 manual.
problem solved! I brought the di622markII to the store where i bought it, and and bla...bla...bla...I have the new di866. it worked well with my old D70s , i like it.