Can't get SPDIF to work properly with my Tascam US-144mkII

I had no trouble setting up reamping sessions with my Tascam US-1641, but after moving to a apartment I hooked up my US-144 instead to save some space.

I am QUITE SURE I connected everything right with the SPDIF cables but it doesn't work as I want it to:

1. I can record guitar through Front Input through the SPDIF output to my Tascam
2. I CANNOT get the signal to go from Tascam SPDIF output to my Kemper

And yes I have the input set to SPDIF ...

Does anybody have a clue what to do??

Sorry... Haha. FIXED.

I had "Digital Out R" instead of "Digital Out L" or if it was the other way around maybe, but now it all works!