Ipod touch not synching with latest version of Itunes

I connect my Ipod touch 2nd generation 8 gig to Itunes latest version and it makes the moves as if it were synching but contacts and events do not appear on the Ipod after synching. I mean new events and contacts. I have erased duplicates on my MacBook Pro and they still appear on the Ipod. What could this be? Helo!