zhaolu 2.5C doesn't accept Roku output...

I just installed a Zhaolu 2.5C in my system. To my dismay it doesn't want to accept the signal coming from my Roku M1000. I tried coax and optical. No avail. I tried my Oppo both with optical and coax and everything works as expected. My Roku does produce output on the optical and coax since my Entech DAC worked with it just fine.

Could there be some kind of incompatibility from the Roku M1000 to the Zhaolu 2.5C? Weird. Anyone seen this behavior or have some ideas?

peter