How to Connect SD218Play NAS to my RS250A to play my mp3

Good morning,
I just received my RS250A
My Synology SD218Play Server is connected to my local network behind my freeBox Revolution.
I want to play on my RS250A my MP3s which are on my DS218Play Server
On the RS250A >Music >Folder> Network >DS218Play
The reader asks me:

  • Login? But which ?
  • Password ? But Which ?
    If I use this information about the Server, the return message is: “Network error”
    Yet the RS250A sees my DS218Play well.
    Can you help me please ?
    Thanks in advance. To read to you. cdlt

Login and password are from the NAS user, who has acces to the folder with your music. smb1 must be active on the NAS. Try connection via the App if it does not work on the device itself.