Roon doesn‘t work with my HomePod

I am running roon on a Nucleus 2nd Gen connectet via Ethernet to my network. My Apple HomePod ist Running via Apple Music etc. well but not from roon.
In the Preferences in roon I see my HomePod and i aktivate it. When i now want to play music it doesn‘t start playing.
There are no other devices connectet to the homepod…