Rega DAC problems


I'm having trouble getting my Rega DAC to lock on to a 24/192 feed from my Oppo 105 disk player.
I'm using Toslink connector and playing a Blu-Ray version of: Yes - Close to the Edge.
The DAC is showing 44.1-48K.
I've checked the settings on the Oppo and they look proper. Pressing the info button displays 24/192 as the sampling rate.
I tried asking Rega for help but Agon email address came back invalid.
What am I doing wrong?
128x128dweller
Thanks for your interest and effort. I've always felt ripped-off that I couldn't playback hi-res from my Oppo. It would be interesting to know if 192/24 downloads would lock-on to player.
I can't try that out as my Squeezebox Touch only supports 24/96 and below and downsamples 24/192 to 24/96.
I hear you though as I picked up the Rega DAC for all it's inputs and Blu Ray Audio, SACD and DVD-Audio won't benefit from these connections to the DAC. Very frustrating indeed! 

@craoul79 Yes! When I try playing anything with 88.2kHz sample frequency, it comes out horribly distorted. And it's not a cable capacity problem, because it works fine if I upsample to 96kHz. I tried with both 16- and 24-bit width, and 88.2kHz is a problem in both.

Did you ever find out anything more about this?

The Rega DAC is long-gone. I think the root cause being my DAC was a Mark-I.

I think Rega fixed the problem in the Mark-2.

The BluRay copy protection probably still valid. I love the sound and convenience of digital but the environment is far too complicated and confusing. I haven't even considered streaming (P.S. I was a Mainframe programmer for 20 years).