Hi David
I received my new board a week ago and it's working like a charm.
I want to thank Roland from Think3dPrint3d for the great customer service and you, David, for your rapid and efficient help to find and solve my problem.
The duetEthernet is a really good controller and i'm now fully convince to have make the right choice.
Thank you all and have a merry christmas and a happy new year !
Johann