Connecting Creative Nomad Jukebox3

Hello!!!! I have a Creative Nomad Jukebox 3 that I would like to be able to use with Knoppix. It's a 20GB mp3 player that can also be used as a portable hard drive.
It can be connected to the computer by firewire or by USB, I've tried having it connected to the computer and turned on at boot time both ways but it isn't detected :-(
What I really want to do with this is to be able to transfer files from the computer to the Jukebox. In Windows XP this is done with the program Creative File Manager.
I'm running Knoppix 3.4 from the CD-ROM drive on a laptop.
Could any one help me?? I'm a linux newbie so if you could explain step by step I would appreciate it very much.
Thanks for the help!!!