Ipod Shuffle 4th gen firmware 1.1 on Ubuntu 10.04

I have an ipod shuffle 4th generation with firmware 1.1, I'm using Ubuntu 10.04, I have medibuntu install and the package for plugins in Rhythm box. The problem I'm having is when I transfer music to the ipod it shows that its transfered, than once I try to listen to my ipod shuffle it tells me in a voice, "please sync music to your ipod with itunes". Now the weirdest part is when i boot from ubuntu into windows 7 and open up itunes all the music appears that I transfered in ubuntu with rhythm box, then when I play it its fine, I don't have any of this music in windows 7, I only have it for compatibility reason and windows 7 has a 40 gig partition while ubuntu has 256 gigs and all my musics. What can I do to allow me to listen to the music in my ipod that I transfered with rhythm box in ubuntu. I don't want to have to go to windows 7 everytime I want to listen to music. Please help me, and thank you for your time reading.