Problem changing optical format from adat to spdif on my 003.

[mallanikkelsen]

Hello there

I have a ProTools setup consisting of the following:

ProTools 12 and the 003 hardware surface.
Running on a windows 10 pc intel core I-9900K 3.6 GHZ CPU 32 GB of ram.

I have connected the 003 through firewire and generally everything works perfectly. except that I cannot seem to get any sound though the optical output port on my 003 though to my surround sound preamplifier. What I basicly want is to be able to monitor the stuff I record in ProTools on an input in my Preamp via the optical output on the 003. I have tried changing the optical format in the hardware setup menue from Adat into spdif optical format, however I am simply not allowed to. I am not getting any error message, the setting simpley just reverts back to adat. The same thing happens when trying to swich clock source from internal and into something else. Only internal seems to be allowed. I have Checked the setting on my windows system, so that none of the inputs/outputs on the 003 are any of my default audio devices, as I have herd that this could cause a problem. They are not, so that is definitely not the issue.

I wonder if anyone inhere has an idea as to what I can try?

All the best from Allan