running the unit at 96KHz is not recommended with S/Pdif. AES/EBU is the standard professional protocol adviced for the highest sampling rates.
Once you have connected the units, you need to make sure Eclipse is running on the card clock. Go to SETUP > DIG-IN and choose the appropriate connector. Then move to CLOCK and set it to DigIn
Hz and you should see the sampling frequency showing up as soon as Eclipse is clocked. The EXT LED will light up steady.