Reply to MOTU Ultralite digital out to DJM-800

Hi I'm trying to hook up digital output from a MOTU Ultralite mk3 into the digital inputs on a DJM-800. As far as I understand the DJM-800 only accepts a linear PCM signal. The MOTU outputs linear PCM.

Basically I'm getting nothing on the DJM-800. I can see the output levels on the Ultralite. So the problem seems to be on the DJM-800 end.

Anyone got any ideas why this is happening. I've tested the cable it's fine.