Android subsonic app : downloading issue

Hello! First sorry for the bad english, I will to my best so be indulgent.
I used the subsonic application for a while now and everything worked perfectly until a few weeks. The application could'nt download songs anymore, it print a "Downloading 0 ko/s" message under the song's name and nothing happen next.
If I uninstall the app and install it again it works for a while and then stop.
We didn't changed anything about the server's configuration.
Do you have any ideas from where the problem came? And about how I could arrange that (Re-install the app everytime is quit boring)
Thanks!
I used the subsonic application for a while now and everything worked perfectly until a few weeks. The application could'nt download songs anymore, it print a "Downloading 0 ko/s" message under the song's name and nothing happen next.
If I uninstall the app and install it again it works for a while and then stop.
We didn't changed anything about the server's configuration.
Do you have any ideas from where the problem came? And about how I could arrange that (Re-install the app everytime is quit boring)

Thanks!