How to Connect My MP3 Player to my FireWire Solo AI?

Hi there,

I own an audio interface from M-Audio, FireWire Solo.

I want to connect my mp3 player (normal phone jack) to my FireWire Solo, which output to my speakers.

What set of cables should i get?

Details of the Audio Interface:
http://www.m-audio.com/products/en_us/FireWireSolo.html

Hope you guys got an answer for me!

Thanks!