Audiolan Card did not work as expected

Hi!

I found the mistake! It was an old DANTE-Config-File loaded by a staff-member (without inform anybody).
There was a wrong Multicast-Flow.

I was on the wrong way with trouble-shooting because I thought it was an network issue on the audiolan-card (because of the slow and lost pings).
I did not recognize that a wrong flow pull down the tcpip answeres.

Thanks for your help!