Ok, I see you have Oppo 103eu.
go to The Audio Format Setup / HDMI Audio / select Bitstream
SACD Output select DSD
as DSD output is only available from the HDMI 2 OUT port, please make sure that you connected that one instead of HDMI 1 out port
if all is working properly, the green light on "Lock" in the front panel should appear, and the light on your BDA3 on DSD64 should be amber when sacd is playing on the Oppo.