I have a Transcend 4GB flash drive and a JVC DVD player. I'm trying to play mp3 files. The DVD player has a USB port, and I'm pretty sure that the player's not the problem, 'cause my sister's flash drive works perfectly on it... but when I plug in mine it just says "No Data". It worked before though. It stopped working when I reformatted my flash drive, I had to because there were a bunch of viruses in it. How can I make it work again...