Profire 2626 SPDIF : no audio with Yamaha receiver

I just bought a Profire 2626 .

http://forums.m-audio.com/archive/index.php/t-4194.html

I get no sound on my Yamaha RX-V2500 when I use the SPDIF out of the 2626.
The analog output works fine.

The receiver's SPDIF works fine with several other devices including my PC's Realtek SPDIF output, and my Roland VS-2400CD's SPDIF output.

Seems that I am not the only one with this problem :
http://forums.m-audio.com/archive/index.php/t-4194.html

Apparently it is related to the SPDIF copy protection.

Is there any fix for this ?