Vortex Sound Research

Hey all, I purchased what i thought what a V2 ES-6, but wound up being a V1. I’ve hooked everything up as documented on the expert sleepers website, but still not getting a signal in from the ES-6. Are they not compatible? Am I able to connect the ADAT out of the ES-6 to the ADAT in of the ES-8 and use it that way? Any help here is greatly appreciated.