playlist lag on sd card

My Fuze won’t play FLAC file, although I already updated the firmware to v.10.10.15a. But the ogg works fine. The FLAC file is detected in song list, but whenever I select it, my Fuze always skip it to the next ‘non FLAC’ songs. I encoded the song with FLAC quality 5 and I’m using 2 GB non-SDHC card. Is there any faulty with them?