Can you try downloading some SAMPLE AUDIO files from our site (that have the .lrc file) and see if they play on your player?
Have a look here -->
http://www.mympxplayer.org/sample-audio-dc8.html.
Let me know which ones work and which doesn't doesn't.
We have to try to find a pattern.
I know sometimes the ENCODING of the .lrc file has to be something specific too.