Hilfe: CS8406 +CS8416 U-bit

Hi!

Sorry, for the english text, but my german is too poor, anyway i can
understand a little bit.

But anyway, I seek a solution for, the CS8406 user bit management. So I
want to Send some user information throught optical connection, using
the U-bit of the digital audio. So have someone some information,
experiance with this. I need to receive the sent with a CS8416 chip.

Someone examples, etc?
Or some usefull links, I read the user guides of the chips but, they
are giving me to few example.... how to make it. I set the register
bits which are important but, my sent data didnt received...

Thx, in forward... Peter