Denafrips Ares DAC has arrived... need help with Oppo connectivity


Gents,
I got the Denafrips DAC today and connected it to my Oppo 103 via coax and USB and get no signal.  I suspect there is some programming necessary to connect to the DAC.   Can anyone guide me through the Oppo programming necessary.  I don't know how to get to the Menu set up screen since I used my Oppo exclusively for audio.  Any help will be appreciated.  
whitestix
4hannons and stforh,

It is very odd that I don't hear at least some difference in the sound with the addition of a DAC.  I will borrow my pal's Oppo 95 which has the Modwright tubes mods for a comparison as well as a non-Oppo CD player.  
I am using a Oppo 205 at the moment and it sounds excellent.  Inserting the Denafrips into the system produces no sonic difference that I can discern.  My foray into upgraded DAC's has come to an end.  If if felt my Oppo was deficient, I would continue my search and consider much more expensive DACs, but the Oppo sounds fantastic.  I am keen to do further comparisons of the new 205 to my 103 to see if I hear any difference.  I can clearly state that the 205 sounds excellent in my system, but the Denafrips DAC adds nothing.  Cheers, Mark 
A further thought:  I just switched my DSPeaker Anti-Mode processor back into the signal path and it makes a remarkable difference.  It clearly attenuates the mid-bass hump and makes the sound more coherent and balanced.  It has been a very worthy component in my system.