cant get my digi kill to work on muzzy air shifter

[maui busa]

i put on a muzzy air shifter on my 05 hayabusa I can't get the digi kill to work!!! It has two long wires on the digi kill a white/red & red/white it say to hook them up to the yellow/red under the tank I tried on the big white connetor both sides before and after the power commander but the bike wouldn't start and the fi light would come on... so I put it on the yellow/red coming from the tank/fuel pump and the bike starts but digi kill doesn't work. Can anybody help me??