device is offline

[Jean-Louis Giraud <giraud_jean-louis orange fr>]

hello 

I just bought a hi-fi network drive UPnP Rotel RT 12. I installed Rygel
on my computer to send music files on my stereo via the Rotel RT 12. The
problem is that there are often breaks in the transmission of music
files with display: "device is offline" while my computer is running
very well. I tried wire connexion instead of wireless but nothing
changed. 
Does anyone have an idea? 
cordially

Jean-Louis Giraud-Desrondiers <giraud_jean-louis orange fr>