Need help, songs dont appear and updater doesn't install.

[Omikron]

I pluged in my Sansa Fuze into my Ubuntu 9.04 so I could add some more songs to it. When I got to the folder it said i didn't have any music in my mp3. So i started looking around the web to find out why. I've come to the conclusion that the mp3 and the Ubuntu aren't compatible so i downloaded the firmware updater but it doesn't install. I've tried Wine and Crossover. I am new to Linux (started less than a week ago).
If anyone can please help me, thanks.