I wonder if you have a codecs problem. Can you play
95bfm (flac) CJSW (aac) WRFG (mp3)
95bfm
CJSW
WRFG
If you can only play the flac station, then it is your codecs. There are known issues with QNAPs and a number of threads in the forum. See this one for instance.
Here’s another possibility