cannot stream to my speaker system

[joost1]

Hello,

I can stream music easily with windows mediaplayer within my home network from my computer to my Marantz speaker System (sr5008).

How is it  possible that running spotify on this computer does not allow me to stream to this speaker.

If it is possible with windows mediaplayer, it should be possible with the connect function of Spotify, shouldn't it ?

Many thanks for your help !

Joost