ADAU1466 SPDIF INPUT to I2S OUTPUT port problem

Hi everyone,

For a project I am evaluating the capabilities of the ADAU1466/63 with the corresponding EVAL Board (Rev. B).
For my configuration I need to be able to select between one I2S Input (via. Serial Input Port 3) and one SPDIF input (SPDIF Receiver to ASRC0) routed through some DSP algorithms and finally output it to Serial Output Port 2.
My serial input port (3) is fed by an ADC and configured as subordinate (96kHz, 6.03Mhz) and the serial output port (2) is configured as Main (96kHz, 6.03Mhz). Everything is clocked by an external 24.576 Mhz Main clock.

The connection ADC-> SerialInputPort3 -> DSP -> SerialOutputPort2 - DAC-> Amp works without a problem. I also can measure the correct signal with a dScope at the SPDIF Outputs of the ADAU. But switching to the SPDIF Input via ASRC0 i can't get a signal at the output. 
The dScope shows that the signal from the ADAU1466 SPDIF TX locks at the correct output sample rate but I can't measure any signal if I input the digital signal. 

I also can not detect the SPDIF lock byte on the ADAU1466, which kind of explains why there is no output from the serial output port 2, but I don't understand why it can't lock since I am outputting a clean signal via the TOSLINK Port of the dScope.

Also I get an error flag on the ASRC0 or ASRC1(which I am not using) and I can't figure out why ?

Any problems in my configuration that won't allow locking of the SPDIF Input Lock ? Am I missing something obvious ? 

Any help is much appreciated

Best