Problems listening to mp3 music with no adsl

Please, I used the mp3 input tutorial and it works when I listen to the music on a computer with adsl connection but not when I listen them on a computer with no adsl connection.I read that when you encode a mp3 song over 160kbps,you get errormessage,but I have encoded mp3 song lower than 160kbps and still sounds discountinous.why? ¿?
I would like to Know if there is any solution to this or maybe loading the songs in a different way?
Thanks in advance and please answer whatever you think will help me!
:kir: