[Q] No sound while playing Hi Fi music with stock player topic

Hi guys. Recently I revert my firmware to 4.2.2, then I root my phone using ioroot, install CWM, and flash dorimanx kernel 2.9. Now stock music player does not produce any sound while playing Hi Fi sound (the Life is good song) but still performing well on mp3. Anyone have same problem ? One more thing, how to make my new music folder indexed on stock music player ? It can detect my music but not showing my folder on the folder tab. Thank you.