Soundfly SD WMA/MP3 Player Car Fm Transmitter for SD Card, USB Stick, Mp3 Players (iPod, Zune)

Purchased Sound-fly SD for my daughter for Christmas. We followed the directions but it does not play mp3 in SD card or IPod. We have tried several different frequencies but can get no sound . When the unit is on the static goes away but there is no music

www.satechi.net