Mobile Phone Tool Version 4.5.6a Download How Do You Download Music From Your Computer To A Boost Mobile KRZR Phone?

How do you download music from your computer to a boost mobile KRZR phone? - mobile phone tool version 4.5.6a download

I have a boost Mobile Unlimited phone and try to music from my computer to my Motorola KRZR phone. Every time I tried to transfer music from my computer to my Motorola KRZR phone is not working, I get an error message that there is something special that I do? I have Motorola Phone Tools on my computer, installed the latest version. Can anyone help?