Profile.XML for MP3 and WMA Audio only Media Renderer?

Hello,
I am using Serviio 1.4.1.2 on Synology DS112, DSM 5.1 -5022.
My Media Renderers are: BubbleUPNP Version 2.3.1 as UPNP Control Point on Android Tablet and AVM Fritz Media Renderer which is Part of the Fritz AVM Repeater N/G ( see: http://www.upnp-database.info/device.jsp?deviceId=350).
I figured out. that the Chaneru Profile is sufficient for transcoding my seveal FLAC files to MP3 succefully. The MP3 stream goes out to the AVM Mediarenderer, but it is not rock stable.
Whenever I select a FLAC file as Input, I see three entries written to the serviio.log:

  Code:

2015-01-28 18:35:08,020 WARN  [ResourceDeliveryProcessor] Invalid request, sending back 500 error
org.serviio.dlna.UnsupportedDLNAMediaFileFormatException: No media description available for required version: MP3
   at org.serviio.delivery.resource.AbstractDeliveryEngine.findMediaInfoForFileProfile(AbstractDeliveryEngine.java:292)
   at org.serviio.delivery.resource.AbstractDeliveryEngine.getMediaInfoForMediaItem(AbstractDeliveryEngine.java:127)
   at org.serviio.delivery.MediaResourceRetrievalStrategy.retrieveResourceInfo(MediaResourceRetrievalStrategy.java:179)
   at org.serviio.delivery.ResourceDeliveryProcessor.deliverContent(ResourceDeliveryProcessor.java:80)
   at org.serviio.upnp.webserver.ResourceTransportRequestHandler.handleRequest(ResourceTransportRequestHandler.java:86)
   at org.serviio.upnp.webserver.AbstractRequestHandler.handle(AbstractRequestHandler.java:61)
   at org.apache.http.protocol.HttpService.doService(HttpService.java:293)
   at org.serviio.upnp.webserver.ServiioHttpService.doService(ServiioHttpService.java:77)
   at org.apache.http.protocol.HttpService.handleRequest(HttpService.java:212)
   at org.serviio.upnp.webserver.WebServer$WorkerThread.run(WebServer.java:196)

Why is that the case ? What's wrong with Profiles.XML ?
Can you construct a profile for the AVM Music only renderer from the information given in the link ?
Many thanks for your help.
Rgds, Thomas

PS: here is the Data from UPNP Spy:
for AVM MediaRenderer; http-get:*:audio/mp3:*,http-get:*:audio/mpeg:*,http-get:*:audio/mpeg3:*,http-get:*:audio/x-wav:*
for BubbleUPNP Renderer: http-get:*:audio/wav:*,http-get:*:audio/wave:*,http-get:*:audio/x-wav:*,http-get:*:audio/mpeg:*,http-get:*:audio/x-mpeg:*,http-get:*:audio/mp1:*,http-get:*:audio/aac:*,http-get:*:audio/flac:*,http-get:*:audio/x-flac:*,http-get:*:audio/m4a:*,http-get:*:audio/mp4:*,http-get:*:audio/x-m4a:*,http-get:*:audio/vorbis:*,http-get:*:audio/ogg:*,http-get:*:audio/x-ogg:*,http-get:*:audio/x-scpls:*,http-get:*:audio/x-ms-wma:*,http-get:*:application/x-ms-wma:*,http-get:*:audio/wma:*,http-get:*:application/wma:*,http-get:*:audio/L16;rate=11025;channels=1:*,http-get:*:audio/L16;rate=22050;channels=1:*,http-get:*:audio/L16;rate=44100;channels=1:*,http-get:*:audio/L16;rate=48000;channels=1:*,http-get:*:audio/L16;rate=88200;channels=1:*,http-get:*:audio/L16;rate=96000;channels=1:*,http-get:*:audio/L16;rate=176400;channels=1:*,http-get:*:audio/L16;rate=192000;channels=1:*,http-get:*:audio/L16;rate=11025;channels=2:*,http-get:*:audio/L16;rate=22050;channels=2:*,http-get:*:audio/L16;rate=44100;channels=2:*,http-get:*:audio/L16;rate=48000;channels=2:*,http-get:*:audio/L16;rate=88200;channels=2:*,http-get:*:audio/L16;rate=96000;channels=2:*,http-get:*:audio/L16;rate=176400;channels=2:*,http-get:*:audio/L16;rate=192000;channels=2:*,http-get:*:video/vnd.dlna.mpeg-tts:*,http-get:*:video/mpeg2:*,http-get:*:video/mpeg:*,http-get:*:application/x-mpegurl:*,http-get:*:application/vnd.apple.mpegurl:*,http-get:*:video/x-m4v:*,http-get:*:video/mp4v-es:*,http-get:*:video/mp4:*,http-get:*:video/mp2t:*,http-get:*:video/quicktime:*,http-get:*:video/x-ms-wmv:*,http-get:*:video/x-ms-asf:*,http-get:*:video/x-ms-video:*,http-get:*:video/divx:*,http-get:*:video/vnd.divx:*,http-get:*:video/x-divx:*,http-get:*:video/x-ms-avi:*,http-get:*:video/avi:*,http-get:*:video/x-msvideo:*,http-get:*:video/x-mkv:*,http-get:*:video/mkv:*,http-get:*:video/x-matroska:*,http-get:*:video/ogg:*,http-get:*:video/3gpp:*,http-get:*:video/webm:*,http-get:*:application/flv:*,http-get:*:video/x-flv:*,http-get:*:video/flv:*,http-get:*:video/wtv:*,http-get:*:application/vnd.rn-realmedia-vbr:*,http-get:*:video/vnd.rn-realvideo:*,http-get:*:application/vnd.rn-realmedia:*,http-get:*:image/mpo:*,http-get:*:image/bmp:*,http-get:*:image/gif:*,http-get:*:image/jpeg:*,http-get:*:image/png:*,http-get:*:image/jpg:*

[zip]

It's pociking a different profile for playing and browsing. Probably due to the controller (Bubble). You have to assign the same profile to the controller's IP address as the playback device's IP.