Ben Shaw's dashboard

When I try to sync my library, (around 750 songs) with my Creative Zen 16GB, it'll sync only a certain amount of the library, (around 150 songs). This did not happen when I synced it with WMP11, and since my whole library is mp3, then there should be no problem there too. I had Songbird originally installed in Janurary, and the same problem happened around then, but I simply stopped using Songbird, but is there a fix for this? Cheers :-)