LG VX-8600 / AX-8600

On the VX8300, I was able to press "Menu", "0", "0000000", and go to the "Music Player" option to turn MP3 capability on (why it was defaulted to off I have no idea...probably their cooperative monopoly with Windows for WMP 10). However, it states that the VX8600 can play MP3's too, but I can't find a way to get them on there. I placed my sd card in from my 8300 and it already has a folder "my mp3s", I assume, from the 8300. I placed an MP3 in there using the cable and bitpim, but can only access it when checking the "memory". It doesn't show up in the player. HOWEVER, MP3's DO show up when I put them in the appropriate folder for ringers. Any way to get MP3's recognized and played without converting to WMA?