TransportPiAES, no data signal out, DAC not recognised

New to this forum. Just completed this streamer: Rasp PI4 powered with PurePi, Fifo Q7 and Transport PI AES . MCLK is conected. Software is Volumio. No signal out to DAC via AES. DAC (Okto 8) not recognized. Using the correct AES cable (110 ohm) Rasp Pi4 was previously being used with no issues. Help?
Issue resolved with help from Ian Canada. READ the instructions on the FifoOi Q7 to configure software. Go figure:mad:. Need the enable i2S DAC and select audiophonics ESS DAC as driver. Output now working. Leson learned. Reviewing instructions prior to proceeding further. Old dogs can learn!