Arduino library for WTV020-SD-16P audio module

Hi guys
I'm having problems with my wtv020 sound module. It seems that the LED blinks a few times, then stop blinking. But there is no output sound can be detected from the speakers. I'm using a two types of SD cards which is SanDisk 2GB MicroSD and SD-C02G microSD/T-Flash Card Toshiba. I've copied the AD4 files form circuitstoday into the SD cards, so i assume there is no problem with the files. Your coorperation is truly appreaciated =D