On the H9000, only one of the following protocols may be active at a time: ADAT, S/PDIF Optical, S/PDIF RCA, AES3 XLR, or AES DB25. This is configured on the front panel’s Clock menu page, or in Emote’s Setup View. It seems you’re trying to use more than one in our setup – RCA and Optical. Is it possible to come out of the Axe with TOSLINK and go out of the H9000 with TOSLINK? That would work.