iTunes won't sync song/s to ipod touch

The only reason I'm noticing this is because I want to put two particular sounds onto my iPod. My iPod can sync apps, videos and for all I know, music, but for some reason these two songs (it may be more then the two I want) will not sync to my iPod from iTunes.

I have the current version of iTunes and am running 3.0 on my iPod Touch 2G, I have no idea what's wrong!?

Thanks