96 i/o with Behringer ada8000?

[pie55]

Hi
I'm using Protools 8.1.1 running @ 48 khz

Im trying to use a Behringer ada8000 with a 96 i/o via adat.
my main interface is a Lynx Aurora 16.

I've selected adat rather than aes/ebu in the hardware menu . My ada8000 has a word clock cable from the 96 i/o out and 96 i/o word clock is selected in the hardware menu.

but in the input of a channel the adat input reads "digilink N/A"
and in the i/o settings the optical are grayed out

anyone?

thanks